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- Ace Electric
- ALCOA Aluminum
- Allegheny Ludlum Corp.
- Allied Signal
- Badger Meter
- Bausch & Lomb
- B.F. Goodrich
- Black & Decker
- Bodycote
- Boeing
- Brown & Sharpe
- Caterpillar, Inc.
- Coltec Industries
- Electrolux
- Eaton Corp.
- Ford Motor Co.
- General Electric
- General Motors
- Gibralter Steel
- Harley Davidson
- Honda
- Honeywell Inc.
- Ingersoll-Rand
- Latrobe Steel Co.
- Linamar
- Lindberg Heat Treating
- Lockheed
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- Lukens Steel
- Mercury Marine
- Moen
- NASA
- Northrop Grumman
- NTN Driveshaft
- Nucor Fastener
- Olin Corp.
- Parker Hannifin
- Pratt & Whitney
- Pridgeon and Clay
- Purolator
- Robert Bosch Corp.
- Rockwell International
- Rolex Co.
- Ryobi Outdoor Products
- Schlumberger
- Skil
- Smith and Wesson
- Snap-on Tools
- Timken Company
- U.S. Army
- U.S. Navy
- U.S. Steel
- Vickers
- Westinghouse Electric
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