Gas operated power generators; Electrolysis machines for generating gases; Machines for generating gas by electrolysis
MachineryGas fired furnaces; Gas heat generators; Gas purification apparatus; Gas purification installations; Gas purification machines; Apparatus for the purification of gas; Installations for the purification of gas
Environmental Control ApparatusFueling of hydrogen gas for vehicles; Installation of apparatus for supply and distribution of gas; Installation, maintenance and repair of apparatus for supplying gas
Building Construction and RepairGas processing services; Gas production services; Generation of gas and electricity; Processing of oil and gas; Production of gas
Treatment of Materials