发布时间:2025-02-09 00:56:47
【答案】:A、B、C、D
教材P327
湿式报警阀组主要元件为止回阀,其开启条件与入口压力及出口流量有关,它与延迟器、水力警铃、压力开关、控制阀等组成报警阀组。
lenovo 联想 小新air14 2021款 14英寸 轻薄本适用对象
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