发布时间:2025-01-31 20:42:05
先明确一下题目,一开双控,还是一开多控?一开双控是单刀双掷开关,应用在(两个开关控制一个灯);一开多控是双刀双掷开关(应用在3个或更多开关控制一个灯上)。如果只用普通单控,L接火线,L1接灯线。如果是后者,看下图:
铝粉作铁栏杆外层涂料铝粉会因遇火星或遇摩擦而爆炸为什么平常铁栏杆不会爆炸
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