... Male End Fitting 旋好尾端螺头 male end of a pipe 外螺纹管端 upset and threaded male end 加厚的阳螺纹端 ...
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管帽是焊接在管端或装在管端外螺纹上以盖堵管子的管件。
Tube is welded pipe or cap in the threads in pipe fittings to cover the wall.
在内螺纹的孔的顶端或者外螺纹的管的端部拥有相同的中径，而且拥有相同的螺纹长度和深度。
Both have the same pitch diameter at the top of the hole of internal threads or end of the pipe on external threads, and both have the same thread lengths or depths.
一锁定螺栓，其周面上具有与膨胀管相匹配的外螺纹，并在其一端设有凹槽。
The locking bolt is provided with an outer thread mating with the expansion pipe at the peripheral surface and has a groove at one end.
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