10 SIC industries for “standard aero”

3443 Fabricated Plate Work (Boiler Shops)

Power and marine boilers, pressure and nonpressure tanks, processing and storage vessels, heat exchangers, weldments and similar products, by the process of cutting, forming and joining metal plates, shapes, bars, sheet, pipe mill products and tubing to custom or standard design, for factory or field assembly.

…tanks, metal plate: lined, tanks, standard and custom fabricated: metal plate-made in boiler, towers, tank: me…

9531 Administration of Housing Programs

Government establishments primarily engaged in planning, administration and research for housing programs.

9651 Regulation, Licensing, and Inspection of Miscellaneous Commercial Sectors

Government establishments primarily engaged in regulation, licensing, and inspection of other commercial sectors, such as retail trade, professional occupations, manufacturing, mining, construction and services.

2421 Sawmills and Planing Mills, General

Sawing rough lumber and timber from logs and bolts, or resawing cants and flitches into lumber, including box lumber and softwood cut stock; planing mills combined with sawmills; and separately operated planing mills which are engaged primarily in producing surfaced lumber and standard workings or patterns of lumber.

…in producing surfaced lumber and standard workings or patterns of lumber.

3823 Industrial Instruments for Measurement, Display, and Control of Process Variables; and Related Products

Industrial instruments and related products for measuring, displaying (indicating and/or recording), transmitting, and controlling process variables in manufacturing, energy conversion, and public service utilities.

…transmitters of process variables, standard signal conversion, turbidity instruments, industrial process type…

8621 Professional Membership Organizations

Membership organizations of professional persons for the advancement of the interests of their profession.

2835 In Vitro and In Vivo Diagnostic Substances

In vitro and in vivo diagnostic substances, whether or not packaged for retail sale.

6411 Insurance Agents, Brokers and Service

Agents primarily representing one or more insurance carriers, or brokers not representing any particular carriers primarily engaged as independent contractors in the sale or placement of insurance contracts with carriers, but not employees of the insurance carriers they represent.

8611 Business Associations

Membership organizations engaged in promoting the business interests of their members.

3825 Instruments for Measuring and Testing of Electricity and Electrical Signals

Instruments for measuring the characteristics of electricity and electrical signals, such as voltmeters, ammeters, wattmeters, watt-hour meters, demand meters, and equipment for testing the electrical characteristics of electrical, radio, and communication circuits and of internal combustion engines.

…electric, spectrum analyzers, standard cells, standards and calibration equipment for electrical measuring, ex…