... tongs, clamp notebook’s mainboard easilier.2,New style of Chinafix Tuyere adopts the design of transmiting flow,it can make the flow ... environmental factors, such as air temperature,humidity, light air flow in room, thickness of PCB, distribution of PCB cooper, etc. There is not ... adjust the fifth stage’s temperature lower properly.2, When welding, the four corners of tuyere bottom always can’t hold out ...