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.
Wind and Compressed Air Engines.
Possible NAICS Codes
333618 – Other Engine Equipment Manufacturing
332710 – Machine Shops
336412 – Aircraft Engine and Engine Parts Manufacturing
335312 – Motor and Generator Manufacturing
811310 – Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance
336310 – Motor Vehicle Gasoline Engine and Engine Parts Manufacturing
333999 – All Other Miscellaneous General Purpose Machinery Manufacturing
333611 – Turbine and Turbine Generator Set Units Manufacturing
336611 – Ship Building and Repairing
441222 – Boat Dealers