This means that you'll be able to search for NAICS codes directly (if that's your jam). We'll do the math; let's make better data on public procurement together.
Hardening, Annealing, Tempering, Normalizing, Cyaniding, and Carburizing Equipment; Furnaces, Flue Welding, Non- Thermal Stress Relieving Systems.
Possible NAICS Codes
332710 – Machine Shops
333994 – Industrial Process Furnace and Oven Manufacturing
332999 – All Other Miscellaneous Fabricated Metal Product Manufacturing
332811 – Metal Heat Treating
332813 – Electroplating, Plating, Polishing, Anodizing, and Coloring
332721 – Precision Turned Product Manufacturing
333517 – Machine Tool Manufacturing
332322 – Sheet Metal Work Manufacturing
331222 – Steel Wire Drawing
423830 – Industrial Machinery and Equipment Merchant Wholesalers