| S.no | Company Name | Founded | Country |
|---|---|---|---|
| 1 | United Ring & Seal Inc. | USA | |
| 2 | General Electric Co. | USA | |
| 3 | Axiam | USA | |
| 4 | Premier Energy | USA | |
| 5 | Dresser-Rand | USA | |
| 6 | Mitsubishi Hitachi Power Systems Americas Inc. | USA | |
| 7 | LAI East/Laser Applications Inc. Div. of LAI International Inc. | USA | |
| 8 | Maetec LLC | USA | |
| 9 | Turbo Dynamics Corp. | USA | |
| 10 | Autoair Inc. | USA | |
| 11 | Jaycraft Corp. | USA | |
| 12 | Lechmotoren US | USA | |
| 13 | H & H Manufacturing Co. Inc. | USA | |
| 14 | Farwest Well Drilling Pump Company | USA | |
| 15 | SPL Control Inc. | USA | |
| 16 | J. F. Mullen Co. Inc. | USA | |
| 17 | Indeck Energy Services Inc. | USA | |
| 18 | Ericksen Olie Inc. | USA | |
| 19 | Chromalloy | USA | |
| 20 | Dyna-Empire Inc. | USA | |
| 21 | Turbine Technologies Ltd. | USA | |
| 22 | Patented Systems Inc. | USA | |
| 23 | Dyna-Therm Corp. | USA | |
| 24 | Solar Turbines Incorporated | USA | |
| 25 | ABB Turbine Manufacturing Div. | USA | |
| 26 | Mitsubishi Heavy Industries America Inc. | USA | |
| 27 | Ace Precision | USA | |
| 28 | Conhagen Industries | USA | |
| 29 | Hy-Pro Filtration | USA | |
| 30 | Harlow Filter Supply Inc. | USA | |
| 31 | Allied Dynamics Corp. | USA | |
| 32 | Kawasaki Gas Turbines | USA | |
| 33 | Tisdale Co. Inc. | USA | |
| 34 | Relevant Power Solutions | USA | |
| 35 | Clean Energy Systems | USA | |
| 36 | TurbineAero | USA | |
| 37 | SS Turbine Services Ltd. | USA | |
| 38 | Williams International | USA | |
| 39 | Unifin International Inc. | USA | |
| 40 | Rusin Consulting Corporation | USA | |
| 41 | Vericor | USA | |
| 42 | PW Power Systems Inc | USA | |
| 43 | Johnson Products Ltd. | USA | |
| 44 | Power Phase LLC | USA | |
| 45 | Vibration Technologists Inc. | USA | |
| 46 | Balance Research Co. | USA | |
| 47 | Metro Machine Works | USA | |
| 48 | Met Weld International | USA | |
| 49 | Terry Corp. | USA | |
| 50 | Metem Corporation a GE Power Business | USA | |
| 51 | M & I Air Systems Engineering | USA | |
| 52 | AGG Susa inc. | USA | |
| 53 | Pneumafil Corp. | USA | |
| 54 | Siemeins Demag Delaval Turbomachinery Corp. | USA | |
| 55 | Rolls Royce Corp. | USA | |
| 56 | Red River Internet of Oklahoma | USA | |
| 57 | Johnson Technology | USA | |
| 58 | Cooper Energy Services | USA | |
| 59 | Sifco Turbine Component Service | USA | |
| 60 | ABB Power Generation Component Reconditioning | USA | |
| 61 | Ulstein Maritime Ltd. | USA | |
| 62 | General Petroleum | USA | |
| 63 | Allison Engine Co. | USA | |
| 64 | Dresser-Rand Co. | USA | |
| 65 | Alturdyne Energy Systems | USA | |
| 66 | ABB Power Generation Inc. Combined Cycle Power Plants | USA | |
| 67 | Central Air Conditioning & Sheet Metal Inc. | USA | |
| 68 | Chromalloy Gas Turbine Corp. | USA | |
| 69 | Hydroelectric Power Plant | USA | |
| 70 | Engelhard Corp./Environmental Catalyst Group | USA | |
| 71 | AeroSpace Balancing | USA | |
| 72 | ABB Power Generation Inc. | USA | |
| 73 | Meco Inc. | USA | |
| 74 | Electronic Technology Systems Inc. | USA | |
| 75 | ABB Power Generation Turbine Manufacturing & Repairs | USA | |
| 76 | Large DC Motors | USA | |
| 77 | Sigma Thermal | USA | |
| 78 | Vaughan's Industrial Repair Co. Inc. | USA | |
| 79 | Barbour Stockwell Inc. | USA | |
| 80 | Surplus Record Machinery & Electrical Equipment | USA | |
| 81 | Siemens Energy | USA | |
| 82 | Siemens Corporation | USA | |
| 83 | Bradken Inc. (Engineered Products Business) | USA | |
| 84 | On Power Inc. | USA | |
| 85 | Test Devices by SCHENCK | USA | |
| 86 | Sylvania | USA | |
| 87 | Valley Forge & Bolt Mfg. Co. | USA | |
| 88 | Caterpillar Inc. | USA | |
| 89 | Senior Flexonics Bartlett Facility | USA | |
| 90 | LAI Southwest Div. of LAI International Inc. | USA | |
| 91 | Turbo Machined Products LLC | USA | |
| 92 | GE Aviation | USA | |
| 93 | Capstone Turbine Corporation | USA | |
| 94 | Industrial Boilers America | USA | |
| 95 | Precision Rings Inc. of Indianapolis | USA | |
| 96 | Aero Turbine Inc. | USA | |
| 97 | Air Filters Inc. | USA | |
| 98 | Rolls-Royce Corp. | USA | |
| 99 | Renewal Parts Maintenance A Division of Mechanical Dynamics & Analysis Ltd. | USA | |
| 100 | Frederick Cowan & Co. Inc. | USA | |
| 101 | Mechanical Dynamics & Analysis | USA |
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