... the ideal temperature of unleaded curve is about 235°C, the one of leaded curve is about 200°C,now after melting and recooling, it will reach the ... .2, When welding, the four corners of tuyere bottom always can’t hold out against the mainboard meanwhile, what to do if some ... 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 ...