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.
Possible NAICS Codes
541330 – Engineering Services
541360 – Geophysical Surveying and Mapping Services
541310 – Architectural Services
532411 – Commercial Air, Rail, and Water Transportation Equipment Rental and Leasing
236220 – Commercial and Institutional Building Construction
212321 – Construction Sand and Gravel Mining