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真空获得化学型旋片式真空泵的研制………………………………………………………………1(15)电算法求罗茨泵转子实际型线……………………………………………………………1(20)浅谈真空卫生………………………………………………………………………………1(28)关于扩散泵结构改
Vacuum chemical rotary vane vacuum pump ...................................................................................................... 1 (15) electrical algorithm to find the actual type of rotor pump rotor ... ... ............................................................... 1 (20) Talking about vacuum hygiene ............................................... ........................... 1 (28) on the diffusion pump structure change