... ,normalizing),braze welding,smelting,copper bar annealing,bar copper heating before forging, and so on.Example :1.various kind ... 1016mm,depth 17.5mm steel tube1000 degree centigrade heating bending. 8.steel tube heating necking down 9. copper bar annealing, wire ... annealing 10. machine tool guideways gear,chain wheel quenching 11.elbow heating tube ...