... 表面摩擦损失 skin friction loss; skin-friction loss 等摩擦损失法 constant pressure loss method 电刷摩擦损失 brush friction loss ...
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The constant-pressure and variable-flow adjustment of inverter-drive pump is widely used for energy saving, but the method has still additional hydraulic loss.
水泵变频调速恒压交流供水是目前应用最广泛的节能供水方式，其能耗较低，但仍存在额外的水力损耗；
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