1. rotary disk heat exchanger 
   转盘式换热器
2. rotary plunger vacuum pump 
   滑阀真空泵
3. The firm has decided to switch to another line of products, which are selling well. 
   公司决定转产制造销路好的产品。
4. sliding-vane rotary vacuum pump 
   旋片真空泵
5. She attended his Rotary Club meeting. 
   她还参加罗博士的“扶轮国际”分社的会议。

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