... of our products, there is an Air Regulator knob, the way how to use will be introduced in the following introduction. About Air Regulator, “5” is the ... 2, When welding, the four corners of tuyere bottom always can’t hold out against the mainboard meanwhile, what to do if ... be increased about 10°C.3, What’s the function of “Air Regulator” button? The size of our tuyere is from 28mm to 46mm, in total ...