the welding cutting restricting is the welding torch, cuts cutting torch most front end the fitting, plays the protective function. 
    the welding cutting restricting, may divide into: the argon arc welding porcelain mouth, the carbon dioxide gas guarantee weld the current divider, the plasma cutting restricting and so on. 
    generally the material quality is 95 porcelains, may also need to produce 97 porcelains, 99 porcelains and so on, according to the customer as well as each kind of special specification products.