wrench hole 中文意思是什麼
wrench hole
解釋
抱閘放鬆孔-
A safety device is defined in the wrench of the lock, in order to avoid that the lock tongue enter into the key hole because of spring rusting on driving
獨特安全設計,首家專利發明(為了防止彈簧生銹或移物而鎖舌自動進入鎖緊孔產生危險而設置) 。
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