... -and-tempering, machining and rivet welding. ur company has branch factories for forging, casting, heat treatment quenching-and-tempering, machining and ... also provide you with a series of services including installation, debugging and commissioning.The machining workshop, rivet welding ... hyperbolic roller, silica-gel roller.And here is the material (steel grade) of our machining parts: CrMo ductile ...