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- NH Materials Laboratory, Inc.
- Somersworth
Laboratory for materials testing, metallurgical testing, failure analysis, and chemical analysis.
www.nhml.com
- Waldron Engineering, Inc.
- Hampton
Providing technical, management, and development solutions to develop, manage, engineer, build, and operate installations.
www.waldroneng.com
- Mechanical Engineering
- Petersen Engineering, Inc.
- Portsmouth
Specializing in building mechanical systems including HVAC, plumbing, process piping, and fire protection systems.
www.petersenengineering.com
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