... Integrity of quality services - Customer Satisfaction Anzhong Shuangji friction welding company has been widely used in the oil industry ... metal cutting tools; available to the market: a continuous drive friction welding machine: C25, C50, C100, C200, C250 , C320, ... C500, C630, C800, C1200 b, inertial friction welding machine: CG63 c may, in accordance with the specific requirements ...