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- Touchstone Research Laboratory
- Triadelphia
Research, engineering, consulting, and testing laboratory specializing in failure analysis, corrosion, alloy development, composites, chemical analysis, impact, and fatigue.
www.trl.com
- Wheeling Brake Block Mfg. Co.
- Bridgeport
Producers of friction materials for brake and clutch applications including oilfield, off-highway truck, mining and marine equipment.
www.wheelingbrake.com
- Civil Engineering
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