1) Air: 1 as cutting gas use 2 as cooling cutting head use 3 as light path internal dust removal use (protect lenses to extend the use of lenses)

2) oxygen: Gas for cutting Carbon Steel (combustion) purity 99.5% 

3) pure nitrogen: Gas for cutting stainless steel (cooling) purity 99.9% (cutting carbon steel speed 3 / 4) 

4) high pure nitrogen: Gas for laser use, purity 99.999% 

5) high pure helium: Gas for laser use, purity 99.999% 

6) high pure carbon dioxide: gas for laser use, purity 99.999%