Acetylene is widely used in Welding, cutting, heating, organic raw materials ... ≥99GB/4844-95bottle/cylinderElectronic industry, leak hunting, floating air balloon.Acetylene(C2H2)≥98GB6819-1996bottle/cylinderWelding, cutting, heating, organic raw materialspropene≥99 ... , stainless steel smelting, container, steel structure manufacture, mold processing, etc. Acetylene