1. a hand-operated pump that resembles a gun; forces grease into parts of a machine. 
   一种手操作的形状像枪的泵；使得油进入机器中。
2. preservative oil and grease 
   防锈油脂
3. irrigation and drainage pump 
   排灌用泵
4. liquid ring vacuum pump 
   液环真空泵
5. molecular sieve adsorption pump 
   分子筛吸附泵

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• 1. 扩散泵润滑脂
  diffusion disk 漫射镜...diffusion pump grease 扩散泵润滑脂...diffusion pump 扩散泵
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