BOTTOM PLUGS EACH TYPE 底塞每种类型 ; 底插头每类
Most cement heads can hold both the top and bottom plugs.
大部分的水泥头都既可以悬挂上胶塞，又可以悬挂下胶塞。
Suitable tests for confirm tightness of ship's bottom plugs to be carried out before launching.
船底塞在下水之前应该进行一些适当的实验。
A component installed near the bottom of the casing string on which the cement plugs land during the primary cementing operation.
安装在套管柱底部附近的一个部件，在初次注水泥作业期间水泥塞坐放于其上。
应用推荐