Ingersoll Rand, Bauer Compressors Inc., Ariel Corporation, Atlas Copco, Siemens, General Electric Manufacturing Company, Fornovo Gas SRL, Quincy Compressor, Aerotecnica, S.A. Grupo Hastinik, MAN Diesel Turbo, Ebara Corporation, Kaishan Group, Jereh Group, Kerui Group US LLC, and Shenyang Blower Works Group Corporation.