发布时间:2025-02-01 01:29:41
在高层建筑给水系统中,目前普遍采用变频调速的泵,变频调速自动供水设备,一般指无负压变频供水设备,根据用户用水量变化来调节水泵转速,使水泵始终工作在高效区,节能节电效果显著。
sharp 夏普 lcd45sf460a 45英寸全高清液晶电视推荐
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