1.  snap
2.  snapper

• 1. 揿钮: fastener | snap fastener
• 2. 揿钮带: snap tape
• 3. 揿钮短裤: snap panty

更多释义

• 1.其刀柄上装有控制揿钮来控制刀头的开启和关闭，使用非常方便。
  The handle of the foldable screwdriver is provided with a control button which is used for controlling switching-on and shutting down of the tool bit.
  dict.yoduao.com

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