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.
Mercury Vapor Turbines.
Possible NAICS Codes
333611 – Turbine and Turbine Generator Set Units Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
333999 – All Other Miscellaneous General Purpose Machinery Manufacturing
333613 – Mechanical Power Transmission Equipment Manufacturing
333618 – Other Engine Equipment Manufacturing
334513 – Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables
332919 – Other Metal Valve and Pipe Fitting Manufacturing