NAICS Code 54 Companies ... NAICS Code 541 Companies ... NAICS Code 5413 Companies ... NAICS Code 54138 Companies ... NAICS Code 541380 Companies
Testing Laboratories and Services
This industry comprises establishments primarily engaged in performing physical, chemical, and other analytical testing services, such as acoustics or vibration testing, assaying, biological testing (except medical and veterinary), calibration testing, electrical and electronic testing, geotechnical testing, mechanical testing, nondestructive testing, or thermal testing. The testing may occur in a laboratory or on-site.
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