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
336412 – Aircraft Engine and Engine Parts Manufacturing
333996 – Fluid Power Pump and Motor Manufacturing
336611 – Ship Building and Repairing
333998 – All Other Miscellaneous General Purpose Machinery Manufacturing
332912 – Fluid Power Valve and Hose Fitting Manufacturing
811310 – Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance
336310 – Motor Vehicle Gasoline Engine and Engine Parts Manufacturing
336612 – Boat Building
336390 – Other Motor Vehicle Parts Manufacturing