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连接两节管子(生产油管、套管或衬管等)所用的带螺纹的连接件。
A threaded coupling used to join two lengths of pipe such as production tubing, casing or liner.
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.
带螺纹的工具接头必须经过正确地鉴别，然后被扭转至正确数值，以确保工具管柱牢固可靠而不损坏工具或管子体部。
The threaded tool joints must be correctly identified and then torqued to the correct value to ensure a secure tool string without damaging the tool or tubular body.
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