The data published with NAICS code 334416 include the following SIC industries:
3661 Telephone and telegraph apparatus (pt)
3677 Electronic coils and transformers
3825 Instruments to measure electricity (pt)
This definition comes from the 1997 NAICS manual. However, for this industry, the 1997 Economic Census Manufacturing did not fully implement the conversion to NAICS. Data for NAICS industry 334416 include establishments primarily engaged in the manufacture of telephone transformers or portable instrument transformers. The NAICS definitions will be fully implemented with the 2002 Economic Census.
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