... open drain pump 开式排放泵 Open Air Pump 不敞开气泵 open absorption heat pump 泵的开式组合方式 ...
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The pump exhaust should lead to the open air or a fume hood.
抽气泵的排气管应该导向室外空旷处或导向一座通风橱。
Points out that the cubic law of pump power is not valid for the cooling water system of central air conditioning for it is an open system. The static head should be the lift in a cooling tower.
指出集中空调冷却水系统为开式系统，一般不适用功率三次方定律，静压头应为冷却塔塔体扬程，并提出了冷却水泵变速时轴功率的计算公式；
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