发布时间:2025-01-19 17:14:49
煤气报警仪发出报警后应立即切断气源,同时开窗通风降低室内煤气浓度,当浓度达到报警值之下后煤气报警仪就停止报警。
买了个系裤子的腰带 没有打孔器怎么办啊 求一个不用打孔器的方法
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