Suggestion : according to the water cubage of aquarium ( pool ) and max. flux if pump , and the size of tube diameter, cut the pagoda type hose joint to match if.
建议：宝塔式水管接头，可根据水族箱（池）的水容积及水泵最高流量，结合管径大小加以切除配套。
Analyses the effect of U-tube diameter, tube quantity in each hole, and the design inlet water temperature of a heat pump unit on the heat exchange capability.
分析了U形管管径、单孔内u形管数量及热泵机组设计进水温度对换热器换热效果的影响。
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