1. floor type boring and milling machine 
   落地镗铣床
2. A projecting cam, as on a rotating shaft, that activates another machine part. 
   凸轮如转轴上突出的挺杆，使另一个机器零件活动
3. A rotating electric machine with two armatures, used to convert alternating current to direct current. 
   旋转变流机一种将交流变为直流的带有两个电容器板的旋转电机
4. A machine that reproduces sound by means of a stylus in contact with a grooved rotating disk. 
   留声机、唱机通过与有磁道的、转动的唱盘连在一起的唱针来发声的机器
5. a machine that sets textual material in type. 
   用活字调整原文材料的机器。

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