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1. This multi-contact switch is used to control the lighting in the room.
这个多触点开关用于控制房间的照明。
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2. The engineer installed a multi-contact switch to improve the safety of the building.
工程师安装了一个多触点开关,以提高建筑物的安全性。
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3. The multi-contact switch is designed to detect and prevent fires in the kitchen.
这个多触点开关设计用来检测和预防厨房的火灾。