... other structure, the cantilever back welding is composed of moving cart, column, cantilever beam, welding arm, welding seam tracking device, ... feeder, electric control system and the welding power, etc.Moving cart is composed of one base, four moving wheel, and 2pcs ... source pressure 0.50.7 MPa5.3 Goods Supply rangea. Cart part moving cart, motor reducer, and vertical column, cross boom b. Welding ...