六篇高考或中考满分英语作文150字左右

如题所述

第1个回答 2015-08-02

买方要求会有不同的材料如:黄铜,不銹钢等为多),经过车床,铣床,抛光并钻孔後成为可用的阀体(图三).

阀门加工:将阀门至於磨床加工研磨以防与阀体接触面不够平整使成品效果不佳(图18).
组装前确定;将阀杆插入阀体确定钻孔适当使阀杆与阀体接触密合.
进行组装:
(1)将阀门放入阀体.
(2)取阀杆置入阀体并在阀体与阀门间放上华司,效果如同垫片.
(3)在两阀门中间放上一个扭力弹簧(应阀之大小而放置数目不同)
(4)在阀门上方再放上一根阀杆以防止阀门破坏.本回答被网友采纳

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