管路上的各种阀门在安装前要拆开清洗，检查阀柄是否灵活，并经试压不漏后方可安装。
Take apart all valves along the pipeline for washing before installation, check whether valve handles are flexible. The valves can be installed after passing the pressure test.
圆规盘内侧壁设计了直径片转动槽，直径片分两片组装进入转动槽，直径片上设计有滑动阀与转动柄，从而达到精确划圆的目的。
Said diameter plate composed of two pieces is installed in the slot on inner side of compasses' disk. The slide valve and turning handle are on the diameter plate for drawing circle precisely.
容置所述阀的手柄，该手柄具有构建成在安装位置接收所述延伸杆的前端部分，及具有从该前端部分倾斜的手枪式握柄部分；
The valve trigger has a pistol grip section that extends along the pistol grip portion of the handle within reach of a user's hand grasping the pistol grip portion from behind.
本实用新型的技 术方案是：包括提柄、袋体、引流管、放流管和开关阀，其 特征是在提柄上固定设有挂钩针。
The novel drainage bag is characterized in that the lifting handle is fixedly provided with a pothook needle.
所述前柄设有调节阀；
所述前柄设有调节阀；
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