About the welding torch ,It is a kind of of the tool which takes advantage of oxygen and low pressure acetylene as a heat source, welding or preheating the ferrous metal or non-ferrous metal parts .It is the main tool for gas welding operation. The role of the torch is to evenly mixed combustible gas and oxygen according to a certain proportion ,spouting at a certain rate from the nozzle discharge, It can form a certain rate, a certain composition flame which is suitable for welding requirements and stable combustion.
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