The North American Industry Classification System NAICS is a system for classifying industries by a six-digit code. [Wikipedia]
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TOP Description Asmts Reccs
back 333xxx Machinery Manufacturing 578 4,703
3334xx Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing 83 680
open 33341x Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing 83 680
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