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.
Quality Control Services: Photographic Equipment
Possible NAICS Codes
333310 – Commercial and Service Industry Machinery Manufacturing
541921 – Photography Studios, Portrait
541519 – Other Computer Related Services
541380 – Testing Laboratories and Services
423410 – Photographic Equipment and Supplies Merchant Wholesalers