4
Refrigeration oils
7
Compression systems for natural gas, fuel gas, coal bed methane and carbon dioxide
11
Compression systems for natural gas, fuel-gas and coal-bed methane and carbon dioxide for the purposes of compression and/or refrigeration; industrial and recreational refrigeration systems; refrigeration shell and coil and shell and tube heat exchangers; refrigerant vessels, ice builders, evaporative condensers for use in refrigeration systems; industrial air cooler units, space saver refrigeration units, refrigeration coils, fine surface refrigeration heat exchangers; ice planers, ice sprinklers for use in refrigeration systems; freezing equipment for making curling rinks, hockey rinks and other ice surfaces, defogging units and liquid immersion poultry freezers
37
Providing services of building, installation and installing, maintaining and servicing CO2 (carbon dioxide) plants; providing services of installation, installing, maintaining and servicing of natural gas compression equipment, industrial and recreational refrigeration systems and specialty gas process systems; providing services, by or under contract, of installing, maintaining and servicing mechanical apparatus in the heating, refrigeration and air-conditioning fields
40
Providing services of custom manufacturing natural gas compression equipment, industrial and recreational refrigeration systems and specialty gas process systems
42
Providing services of custom designing and engineering high-efficiency power plants - Providing services of custom designing and engineering natural gas compression equipment, CO2 (carbon dioxide) plants, industrial and recreational refrigeration systems and specialty gas process systems