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< Back Hose Air
| | Americ Corp. |
| | Cincinnati Fan |
| | Coppus Portable Ventilation |
| | EG&G, Inc. |
| | Grubb Equipment Corp. |
| | Hauck Manufacturing Co. |
| | Hoffman Air & Filtration Systems |
| | Ingersol-Rand |
| | Kooltronic |
| | Lamson |
| | Paxton Products, Inc. |
| | Roots/Dresser |
| | Sonic Air systems, Inc. |
| | Spencer Turbine Co. |
| | Tuthill Corp |
| | U.S. Turbine Corp. |
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