... used in watches, glasses, information products, tools, dies, metal, glass, ceramics, building materials, and other surface treatment industry. Main Features:1. The ... mechanical pump, roots pump, and diffusion pump.3. Coating system for 10~28 arc or 1~4 arc column or plane ... control system is equipped with sound and light alarm devices for circuit overload, water cutoff and air cutoff.7. The control ...