Table of Contents Global Shield Machines and Tunnel Boring Machines Market Research Report 2020, Forecast to 2025 1 Market Overview 1.1 Shield Machines and Tunnel Boring Machines Definition 1.1.1 Analysis of Macroeconomic Indicators 1.1.2 Years Considered 1.2 Shield Machines and Tunnel Boring Machines Segment by Type 1.2.1 Soft Ground TBMs 1.2.2 Hard Rock TBMs 1.3 Market Analysis by Application 1.3.1 Railway and Highway 1.3.2 Municipal Engineering 1.3.3 City Rail System 1.3.4 Others 1.4 Overview of Global Shield Machines and Tunnel Boring Machines Market 1.4.1 Global Shield Machines and Tunnel Boring Machines Revenue (2015-2025) 1.4.2 Global Shield Machines and Tunnel Boring Machines Production and Capacity (2015-2025) 1.4.3 North America Shield Machines and Tunnel Boring Machines Status and Prospect (2015-2025) 1.4.4 Europe Shield Machines and Tunnel Boring Machines Status and Prospect (2015-2025) 1.4.5 Japan Shield Machines and Tunnel Boring Machines Status and Prospect (2014-2025) 1.4.6 China Shield Machines and Tunnel Boring Machines Status and Prospect (2015-2025) 1.5 Market Dynamics 1.5.1 Market Opportunities 1.5.2 Market Risk 1.5.3 Market Driving Force 1.5.4 Porter's Five Forces Analysis 1.5.5 SWOT Analysis 1.6 Coronavirus Disease 2019 (Covid-19): Shield Machines and Tunnel Boring Machines Industry Impact 1.6.1 How the Covid-19 is Affecting the Shield Machines and Tunnel Boring Machines Industry 1.6.2 Shield Machines and Tunnel Boring Machines Business Impact Assessment - Covid-19 1.6.3 Market Trends and Shield Machines and Tunnel Boring Machines Potential Opportunities in the COVID-19 Landscape 1.6.4 Measures / Proposal against Covid-19 2 Global Shield Machines and Tunnel Boring Machines Market Competition by Manufacturer 2.1 Global Shield Machines and Tunnel Boring Machines Sales and Market Share by Manufacturer (2018-2020) 2.2 Global Shield Machines and Tunnel Boring Machines Revenue and Market Share by Manufacturer (2018-2020) 2.3 Global Shield Machines and Tunnel Boring Machines Industry Concentration Ratio (CR5 and HHI) 2.4 Top 5 Shield Machines and Tunnel Boring Machines Manufacturer Market Share 2.5 Top 10 Shield Machines and Tunnel Boring Machines Manufacturer Market Share 2.6 Date of Key Manufacturers Enter into Shield Machines and Tunnel Boring Machines Market 2.7 Key Manufacturers Shield Machines and Tunnel Boring Machines Product Offered 2.8 Mergers & Acquisitions Planning 3 Analysis of Shield Machines and Tunnel Boring Machines Industry Key Manufacturers 3.1 Herrenknecht 3.1.1 Company Details 3.1.2 Product Information 3.1.3 Herrenknecht Shield Machines and Tunnel Boring Machines Production, Price, Cost, Gross Margin, and Revenue (2018-2020) 3.1.4 Main Business Overview 3.1.5 Herrenknecht News 3.2 CRGIC 3.2.1 Company Details 3.2.2 Product Information 3.2.3 CRGIC Shield Machines and Tunnel Boring Machines Production, Price, Cost, Gross Margin, and Revenue (2018-2020) 3.2.4 Main Business Overview 3.2.5 CRGIC News 3.3 CRCHI 3.3.1 Company Details 3.3.2 Product Information 3.3.3 CRCHI Shield Machines and Tunnel Boring Machines Production, Price, Cost, Gross Margin, and Revenue (2018-2020) 3.3.4 Main Business Overview 3.3.5 CRCHI News 3.4 Tianhe Mechanical Equipment 3.4.1 Company Details 3.4.2 Product Information 3.4.3 Tianhe Mechanical Equipment Shield Machines and Tunnel Boring Machines Production, Price, Cost, Gross Margin, and Revenue (2018-2020) 3.4.4 Main Business Overview 3.4.5 Tianhe Mechanical Equipment News 3.5 Liaoning Censcience Industry Co., Ltd 3.5.1 Company Details 3.5.2 Product Information 3.5.3 Liaoning Censcience Industry Co., Ltd Shield Machines and Tunnel Boring Machines Production, Price, Cost, Gross Margin, and Revenue (2018-2020) 3.5.4 Main Business Overview 3.5.5 Liaoning Censcience Industry Co., Ltd News 3.6 Komatsu 3.6.1 Company Details 3.6.2 Product Information 3.6.3 Komatsu Shield Machines and Tunnel Boring Machines Production, Price, Cost, Gross Margin, and Revenue (2018-2020) 3.6.4 Main Business Overview 3.6.5 Komatsu News 3.7 NHI Group 3.7.1 Company Details 3.7.2 Product Information 3.7.3 NHI Group Shield Machines and Tunnel Boring Machines Production, Price, Cost, Gross Margin, and Revenue (2018-2020) 3.7.4 Main Business Overview 3.7.5 NHI Group News 3.8 Kawasaki 3.8.1 Company Details 3.8.2 Product Information 3.8.3 Kawasaki Shield Machines and Tunnel Boring Machines Production, Price, Cost, Gross Margin, and Revenue (2018-2020) 3.8.4 Main Business Overview 3.8.5 Kawasaki News 3.9 Terratec 3.9.1 Company Details 3.9.2 Product Information 3.9.3 Terratec Shield Machines and Tunnel Boring Machines Production, Price, Cost, Gross Margin, and Revenue (2018-2020) 3.9.4 Main Business Overview 3.9.5 Terratec News 3.10 Hitachi Zosen 3.10.1 Company Details 3.10.2 Product Information 3.10.3 Hitachi Zosen Shield Machines and Tunnel Boring Machines Production, Price, Cost, Gross Margin, and Revenue (2018-2020) 3.10.4 Main Business Overview 3.10.5 Hitachi Zosen News 3.11 Shanghai Tunnel Engineering Co., Ltd 3.11.1 Company Details 3.11.2 Product Information 3.11.3 Shanghai Tunnel Engineering Co., Ltd Shield Machines and Tunnel Boring Machines Production, Price, Cost, Gross Margin, and Revenue (2018-2020) 3.11.4 Main Business Overview 3.11.5 Shanghai Tunnel Engineering Co., Ltd News 3.12 Xugong Kaigong 3.12.1 Company Details 3.12.2 Product Information 3.12.3 Xugong Kaigong Shield Machines and Tunnel Boring Machines Production, Price, Cost, Gross Margin, and Revenue (2018-2020) 3.12.4 Main Business Overview 3.12.5 Xugong Kaigong News 3.13 JIMT 3.13.1 Company Details 3.13.2 Product Information 3.13.3 JIMT Shield Machines and Tunnel Boring Machines Production, Price, Cost, Gross Margin, and Revenue (2018-2020) 3.13.4 Main Business Overview 3.13.5 JIMT News 4 Global Shield Machines and Tunnel Boring Machines Market Size Categorized by Regions (2015-2020) 4.1 Global Shield Machines and Tunnel Boring Machines Sales Market Share by Region 4.2 Global Shield Machines and Tunnel Boring Machines Revenue Market Share by Region (2015-2019) 4.3 Global Shield Machines and Tunnel Boring Machines Sales, Revenue, Price and Gross Margin (2015-2020) 4.4 North America Shield Machines and Tunnel Boring Machines Market Size Detail 4.4.1 North America Shield Machines and Tunnel Boring Machines Sales Growth Rate (2015-2020) 4.4.2 North America Shield Machines and Tunnel Boring Machines Sales, Revenue, Price and Gross Margin (2015-2020) 4.5 Europe Shield Machines and Tunnel Boring Machines Market Size Detail 4.5.1 Europe Shield Machines and Tunnel Boring Machines Sales Growth Rate (2015-2020) 4.5.2 Europe Shield Machines and Tunnel Boring Machines Sales, Revenue, Price and Gross Margin (2015-2020) 4.6 Japan Shield Machines and Tunnel Boring Machines Market Size Detail 4.6.1 Japan Shield Machines and Tunnel Boring Machines Sales Growth Rate (2015-2020) 4.6.2 Japan Shield Machines and Tunnel Boring Machines Sales, Revenue, Price and Gross Margin (2015-2020) 4.7 China Shield Machines and Tunnel Boring Machines Market Size Detail 4.7.1 China Shield Machines and Tunnel Boring Machines Sales Growth Rate (2015-2020) 4.7.2 China Shield Machines and Tunnel Boring Machines Sales, Revenue, Price and Gross Margin (2015-2020) 5 Global Shield Machines and Tunnel Boring Machines Market Segment by Type 5.1 Global Shield Machines and Tunnel Boring Machines Revenue, Sales and Market Share by Type (2015-2020) 5.1.1 Global Shield Machines and Tunnel Boring Machines Sales and Market Share by Type (2015-2020) 5.1.2 Global Shield Machines and Tunnel Boring Machines Revenue and Market Share by Type (2015-2020) 5.2 Soft Ground TBMs Sales Growth Rate and Price 5.2.1 Global Soft Ground TBMs Sales Growth Rate (2015-2020) 5.2.2 Global Soft Ground TBMs Price (2015-2020) 5.3 Hard Rock TBMs Sales Growth Rate and Price 5.3.1 Global Hard Rock TBMs Sales Growth Rate (2015-2020) 5.3.2 Global Hard Rock TBMs Price (2015-2020) 6 Global Shield Machines and Tunnel Boring Machines Market Segment by Application 6.1 Global Shield Machines and Tunnel Boring Machines Sales Market Share by Application (2015-2020) 6.2 Railway and Highway Sales Growth Rate (2015-2020) 6.3 Municipal Engineering Sales Growth Rate (2015-2020) 6.4 City Rail System Sales Growth Rate (2015-2020) 6.5 Others Sales Growth Rate (2015-2020) 7 Shield Machines and Tunnel Boring Machines Related Market Analysis 7.1 Upstream Analysis 7.1.1 Macro Analysis of Upstream Markets 7.1.2 Key Players in Upstream Markets 7.1.3 Upstream Market Trend Analysis 7.1.4 Shield Machines and Tunnel Boring Machines Manufacturing Cost Analysis 7.2 Downstream Market Analysis 7.2.1 Macro Analysis of Down Markets 7.2.2 Key Players in Down Markets 7.2.3 Downstream Market Trend Analysis 7.2.4 Sales Channel, Distributors, Traders and Dealers 8 Global Shield Machines and Tunnel Boring Machines Market Forecast 8.1 Global Shield Machines and Tunnel Boring Machines Sales, Revenue Forecast 8.1.1 Global Shield Machines and Tunnel Boring Machines Sales Growth Rate Forecast (2020-2025) 8.1.2 Global Shield Machines and Tunnel Boring Machines Revenue and Growth Rate Forecast (2020-2025) 8.1.3 Global Shield Machines and Tunnel Boring Machines Price and Trend Forecast (2020-2025) 8.2 Global Shield Machines and Tunnel Boring Machines Sales Forecast by Region (2020-2025) 8.2.1 North America Shield Machines and Tunnel Boring Machines Sales, Revenue Forecast (2020-2025) 8.2.2 Europe Shield Machines and Tunnel Boring Machines Sales, Revenue Forecast (2020-2025) 8.2.3 Japan Shield Machines and Tunnel Boring Machines Production, Revenue Forecast (2020-2025) 8.2.4 China Shield Machines and Tunnel Boring Machines Production, Revenue Forecast (2020-2025) 9 Research Findings and Conclusion 10 Appendix

List of Tables and Figures Figure Shield Machines and Tunnel Boring Machines Picture Table Global Shield Machines and Tunnel Boring Machines Sales by Type Figure Global Sales Market Share of Shield Machines and Tunnel Boring Machines by Product Type in 2019 Table Breakdown of Shield Machines and Tunnel Boring Machines by Company Type (Tier 1, Tier 2 and Tier 3) Figure Shield Machines and Tunnel Boring Machines Market Share by Company Type (Tier 1, Tier 2 and Tier 3) Figure Soft Ground TBMs Picture Figure Hard Rock TBMs Picture Table Global Shield Machines and Tunnel Boring Machines Sales by Application Figure Global Shield Machines and Tunnel Boring Machines Sales Market Share by Application in 2019 Figure Railway and Highway Picture Figure Municipal Engineering Picture Figure City Rail System Picture Figure Others Picture Table Shield Machines and Tunnel Boring Machines Market Size Comparison by Region (2019-2025) (K Units) & (Million US$) Figure Global Shield Machines and Tunnel Boring Machines Revenue (Million US$) (2015-2025) Figure Global Shield Machines and Tunnel Boring Machines Production (K Units) (2015-2025) Figure North America Shield Machines and Tunnel Boring Machines Revenue (Million US$) Growth Rate (2015-2025) Figure Europe Shield Machines and Tunnel Boring Machines Revenue (Million US$) Growth Rate (2015-2025) Figure Japan Shield Machines and Tunnel Boring Machines Revenue (Million US$) Growth Rate (2014-2025) Figure China Shield Machines and Tunnel Boring Machines Revenue (Million US$) Growth Rate (2015-2025) Table Market Opportunities in Next Few Years Table Market Risks Analysis Table Market Drivers Figure Porter's Five Forces Analysis Table SWOT Analysis Table Global Shield Machines and Tunnel Boring Machines Sales by Manufacturer (2018-2020) Figure Global Shield Machines and Tunnel Boring Machines Sales Market Share by Manufacturer in 2019 Table Global Shield Machines and Tunnel Boring Machines Revenue by Manufacturer (2018-2020) Figure Global Shield Machines and Tunnel Boring Machines Revenue Market Share by Manufacturer in 2019 Table Global Shield Machines and Tunnel Boring Machines Manufacturers Market Concentration Ratio (CR5 and HHI) Figure Top 5 Shield Machines and Tunnel Boring Machines Manufacturer (Revenue) Market Share in 2019 Figure Top 10 Shield Machines and Tunnel Boring Machines Manufacturer (Revenue) Market Share in 2019 Table Date of Key Manufacturers Enter into Shield Machines and Tunnel Boring Machines Market Table Key Manufacturers Shield Machines and Tunnel Boring Machines Product Type Table Mergers & Acquisitions Planning Table Herrenknecht Company Profile Figure Shield Machines and Tunnel Boring Machines Product Picture and Specifications of Herrenknecht Table Shield Machines and Tunnel Boring Machines Production, Price, Revenue and Gross Margin of 2018-2020 Figure Herrenknecht Shield Machines and Tunnel Boring Machines Market Share (2018-2020) Table Herrenknecht Main Business Table Herrenknecht Recent Development Table CRGIC Company Profile Figure Shield Machines and Tunnel Boring Machines Product Picture and Specifications of CRGIC Table Shield Machines and Tunnel Boring Machines Production, Price, Revenue and Gross Margin of 2018-2020 Figure CRGIC Shield Machines and Tunnel Boring Machines Market Share (2018-2020) Table CRGIC Main Business Table CRGIC Recent Development Table CRCHI Company Profile Figure Shield Machines and Tunnel Boring Machines Product Picture and Specifications of CRCHI Table Shield Machines and Tunnel Boring Machines Production, Price, Revenue and Gross Margin of 2018-2020 Figure CRCHI Shield Machines and Tunnel Boring Machines Market Share (2018-2020) Table CRCHI Main Business Table CRCHI Recent Development Table Tianhe Mechanical Equipment Company Profile Figure Shield Machines and Tunnel Boring Machines Product Picture and Specifications of Tianhe Mechanical Equipment Table Shield Machines and Tunnel Boring Machines Production, Price, Revenue and Gross Margin of 2018-2020 Figure Tianhe Mechanical Equipment Shield Machines and Tunnel Boring Machines Market Share (2018-2020) Table Tianhe Mechanical Equipment Main Business Table Tianhe Mechanical Equipment Recent Development Table Liaoning Censcience Industry Co., Ltd Company Profile Figure Shield Machines and Tunnel Boring Machines Product Picture and Specifications of Liaoning Censcience Industry Co., Ltd Table Shield Machines and Tunnel Boring Machines Production, Price, Revenue and Gross Margin of 2018-2020 Figure Liaoning Censcience Industry Co., Ltd Shield Machines and Tunnel Boring Machines Market Share (2018-2020) Table Liaoning Censcience Industry Co., Ltd Main Business Table Liaoning Censcience Industry Co., Ltd Recent Development Table Komatsu Company Profile Figure Shield Machines and Tunnel Boring Machines Product Picture and Specifications of Komatsu Table Shield Machines and Tunnel Boring Machines Production, Price, Revenue and Gross Margin of 2018-2020 Figure Komatsu Shield Machines and Tunnel Boring Machines Market Share (2018-2020) Table Komatsu Main Business Table Komatsu Recent Development Table NHI Group Company Profile Figure Shield Machines and Tunnel Boring Machines Product Picture and Specifications of NHI Group Table Shield Machines and Tunnel Boring Machines Production, Price, Revenue and Gross Margin of 2018-2020 Figure NHI Group Shield Machines and Tunnel Boring Machines Market Share (2018-2020) Table NHI Group Main Business Table NHI Group Recent Development Table Kawasaki Company Profile Figure Shield Machines and Tunnel Boring Machines Product Picture and Specifications of Kawasaki Table Shield Machines and Tunnel Boring Machines Production, Price, Revenue and Gross Margin of 2018-2020 Figure Kawasaki Shield Machines and Tunnel Boring Machines Market Share (2018-2020) Table Kawasaki Main Business Table Kawasaki Recent Development Table Terratec Company Profile Figure Shield Machines and Tunnel Boring Machines Product Picture and Specifications of Terratec Table Shield Machines and Tunnel Boring Machines Production, Price, Revenue and Gross Margin of 2018-2020 Figure Terratec Shield Machines and Tunnel Boring Machines Market Share (2018-2020) Table Terratec Main Business Table Terratec Recent Development Table Hitachi Zosen Company Profile Figure Shield Machines and Tunnel Boring Machines Product Picture and Specifications of Hitachi Zosen Table Shield Machines and Tunnel Boring Machines Production, Price, Revenue and Gross Margin of 2018-2020 Figure Hitachi Zosen Shield Machines and Tunnel Boring Machines Market Share (2018-2020) Table Hitachi Zosen Main Business Table Hitachi Zosen Recent Development Table Shanghai Tunnel Engineering Co., Ltd Company Profile Figure Shield Machines and Tunnel Boring Machines Product Picture and Specifications of Shanghai Tunnel Engineering Co., Ltd Table Shield Machines and Tunnel Boring Machines Production, Price, Revenue and Gross Margin of 2018-2020 Figure Shanghai Tunnel Engineering Co., Ltd Shield Machines and Tunnel Boring Machines Market Share (2018-2020) Table Shanghai Tunnel Engineering Co., Ltd Main Business Table Shanghai Tunnel Engineering Co., Ltd Recent Development Table Xugong Kaigong Company Profile Figure Shield Machines and Tunnel Boring Machines Product Picture and Specifications of Xugong Kaigong Table Shield Machines and Tunnel Boring Machines Production, Price, Revenue and Gross Margin of 2018-2020 Figure Xugong Kaigong Shield Machines and Tunnel Boring Machines Market Share (2018-2020) Table Xugong Kaigong Main Business Table Xugong Kaigong Recent Development Table JIMT Company Profile Figure Shield Machines and Tunnel Boring Machines Product Picture and Specifications of JIMT Table Shield Machines and Tunnel Boring Machines Production, Price, Revenue and Gross Margin of 2018-2020 Figure JIMT Shield Machines and Tunnel Boring Machines Market Share (2018-2020) Table JIMT Main Business Table JIMT Recent Development Table Global Shield Machines and Tunnel Boring Machines Sales (K Units) by Region (2015-2020) Table Global Shield Machines and Tunnel Boring Machines Sales Market Share by Region (2015-2019) Figure Global Shield Machines and Tunnel Boring Machines Sales Market Share by Region (2015-2019) Figure Global Shield Machines and Tunnel Boring Machines Sales Market Share by Region in 2018 Table Global Shield Machines and Tunnel Boring Machines Revenue (Million US$) by Region (2015-2020) Table Global Shield Machines and Tunnel Boring Machines Revenue Market Share by Region (2015-2020) Figure Global Shield Machines and Tunnel Boring Machines Revenue Market Share by Region (2015-2020) Figure Global Shield Machines and Tunnel Boring Machines Revenue Market Share by Region in 2019 Table Global Shield Machines and Tunnel Boring Machines Sales (K Units), Revenue (Million US$), Price (USD/Unit) and Gross Margin (2015-2020) Figure North America Shield Machines and Tunnel Boring Machines Sales (K Units) Growth Rate (2015-2020) Figure Europe Shield Machines and Tunnel Boring Machines Sales (K Units) Growth Rate (2015-2020) Table Europe Shield Machines and Tunnel Boring Machines Sales (K Units), Revenue (Million US$), Price (USD/Unit) and Gross Margin (2015-2020) Figure Japan Shield Machines and Tunnel Boring Machines Sales (K Units) Growth Rate (2015-2020) Table Japan Shield Machines and Tunnel Boring Machines Sales (K Units), Revenue (Million US$), Price (USD/Unit) and Gross Margin (2015-2020) Figure China Shield Machines and Tunnel Boring Machines Sales (K Units) Growth Rate (2015-2020) Table China Shield Machines and Tunnel Boring Machines Sales (K Units), Revenue (Million US$), Price (USD/Unit) and Gross Margin (2015-2020) Table Global Shield Machines and Tunnel Boring Machines Sales by Type (2015-2020) Table Global Shield Machines and Tunnel Boring Machines Sales Market Share by Type (2015-2020) Figure Global Shield Machines and Tunnel Boring Machines Sales Market Share by Type in 2019 Table Global Shield Machines and Tunnel Boring Machines Revenue by Type (2015-2020) Table Global Shield Machines and Tunnel Boring Machines Revenue Market Share by Type (2015-2020) Figure Global Shield Machines and Tunnel Boring Machines Revenue Market Share by Type in 2019 Figure Global Soft Ground TBMs Sales Growth Rate (2015-2025) Figure Global Soft Ground TBMs Price (2015-2020) Figure Global Hard Rock TBMs Sales Growth Rate (2015-2025) Figure Global Hard Rock TBMs Price (2015-2020) Table Global Shield Machines and Tunnel Boring Machines Sales Market Share by Application (2015-2020) Figure Global Shield Machines and Tunnel Boring Machines Sales Market Share by Application in 2019 Figure Global Railway and Highway Sales Growth Rate (2015-2025) Figure Global Municipal Engineering Sales Growth Rate (2015-2025) Figure Global City Rail System Sales Growth Rate (2015-2025) Figure Global Others Sales Growth Rate (2015-2025) Table Key Players of Upstream Markets Table Key Raw Materials Figure Price Trend of Key Raw Materials Table Key Suppliers of Raw Materials Figure Manufacturing Cost Structure of Shield Machines and Tunnel Boring Machines Table Key Players of Downstream Markets Figure Sales Channel Figure Global Shield Machines and Tunnel Boring Machines Production (K Units) Growth Rate Forecast (2020-2025) Figure Global Shield Machines and Tunnel Boring Machines Revenue (Million US$) Growth Rate Forecast (2020-2025) Figure Global Shield Machines and Tunnel Boring Machines Price and Trend Forecast (2020-2025) Table Global Shield Machines and Tunnel Boring Machines Sales (K Units) Forecast by Region (2020-2025) Figure Global Shield Machines and Tunnel Boring Machines Production Market Share Forecast by Region (2020-2025) Figure North America Shield Machines and Tunnel Boring Machines Sales (K Units) Growth Rate Forecast (2020-2025) Figure North America Shield Machines and Tunnel Boring Machines Revenue (Million US$) Growth Rate Forecast (2020-2025) Figure Europe Shield Machines and Tunnel Boring Machines Sales (K Units) Growth Rate Forecast (2020-2025) Figure Europe Shield Machines and Tunnel Boring Machines Revenue (Million US$) Growth Rate Forecast (2020-2025) Figure Japan Shield Machines and Tunnel Boring Machines Production (K Units) Growth Rate Forecast (2020-2025) Figure Japan Shield Machines and Tunnel Boring Machines Revenue (Million US$) Growth Rate Forecast (2020-2025) Figure China Shield Machines and Tunnel Boring Machines Production (K Units) Growth Rate Forecast (2020-2025) Figure China Shield Machines and Tunnel Boring Machines Revenue (Million US$) Growth Rate Forecast (2020-2025) Figure Methodology/Research Approach Figure Market Size Estimation Figure Author List

Herrenknecht CRGIC CRCHI Tianhe Mechanical Equipment Liaoning Censcience Industry Co., Ltd Komatsu NHI Group Kawasaki Terratec Hitachi Zosen Shanghai Tunnel Engineering Co., Ltd