1. a condenser: during distillation the vapor passes through a tube that is cooled by water. 
   一种冷凝器：；蒸馏时气体通过试管被水冷却。
2. The anode in an electron tube. 
   阳极电子管中的阳极
3. To provide with a tube; insert a tube in. 
   提供管子；插入管道
4. electronic tube parameter measurement 
   电子管电参数测量
5. phototube and photomultiplier tube 
   光电管与光电倍增管

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