She has got a vaccum cleaner,but doesn't know what to do with it. 她有一架真空吸尘器，却不知道怎样利用。
A new disc clicker is designed to repair the crutch of the vaccum electric stove used for synthetic diamond catalysts. 为解决生产触媒用的真空电炉拐臂的修复而设计了花盘夹具，解决了修复电炉拐臂的问题，还可用来加工其它形状复杂的类似零件。
