选择，测量，切割，铰孔和螺纹连接管道，安装喷头，并爬上备用管道。

Select, measure, cut, ream and thread pipe, install sprinkler heads and mount prepared pipe in supports.

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接管和固定套管互以螺纹或卡槽式连接固定。

The connecting pipe and the fixed sleeve pipe are fixedly connected mutually by a screw thread type or a clamping slot type.

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他说，一点点加工需要做的阴极管，螺纹螺栓作出枢纽这是焊接管通过一个惰性气体保护焊机，氩弧焊或。

He says a little machining needs to be done on the cathode tube, making a threaded bolt hub that is welded to the tube via an inert gas shield welder, or tig.

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