內螺紋
拼音：nèi luó wén 英文解釋：
【化】 female thread; inside screw; interior screw; internal screw
internal screw thread中英例句：
- 旋轉活栓產生內螺紋的扳手。
a wrench for turning a tap to create an internal screw thread.
- 旋轉活栓產生內螺紋的扳手。
a wrench for turning a tap to create an internal screw thread
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