Helium; Argon; Hydrogen; Xenon; Oxygen for industrial purposes; Krypton; Nitrogen; Neon; Dry ice; Liquid carbon dioxide for industrial purposes

Gas diverters consisting of a pump, storage and refilling tank, pre-heater, vaporizer, recuperator, condenser and valves; Compressors for machines; Blowing machines for the compression, exhaustion and transport of gases; Valves as machine components; Air compressors; Turbocompressors; Air condensers; Compressed air pumps

Installation and repair of freezing equipment; Construction and maintenance of pipelines; Repair or maintenance of air-conditioning apparatus; Machinery installation, maintenance and repair; Supervision of building construction; Cable laying; Installation, maintenance and repair of air purifying apparatus; Pipe laying services