... Use Method:1. Inspection: Connect the parts of the torch, put the gas pipe to connect the gas chuck, make ... leakage in the trachea, and then hanging up the torch store in a cool ,well ventilated palce .Parts of ... that the cock for the gas supply on the torch is firmly closed, The closing force of the handwheel ... use only original spare parts. Double Switch Gas Heating Torch/ Welding Torch/Cutting Torch