• 1. tapping screw thread: 自攻螺纹
• 2. Self-Tapping Screw-Thread Rolling: 三角牙螺丝
• 3. thread forming tapping screw: 螺纹挤压成形的自攻螺钉

更多释义

• 1.Tapping is the process of cutting a thread inside a hole so that a cap screw or bolt may be threaded into it.
  攻丝是在一个孔中车出螺纹，以便装上有帽螺钉或螺栓。
  dict.yoduao.com

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