emergency alarm bell 中文意思是什麼
emergency alarm bell
解釋
緊急報警警鈴-
A tailor - made visible and audible fire alarm system and an emergency call bell was installed in each disabled toilet
每個傷殘人士廁所內均安裝了一個可看見和聽見的火警警報系統和緊急警鐘。
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