选取取一合适水泵与其串联运行能提高运行效率。
It can increase its operating efficiency that a little proper pump is serially connected with the drainage pump.
经由过程水泵的特征曲线的测定，并、串联实验来选择合理的水泵。
Pass the measurement of the characteristic curve of the pump of water, and, establish the experiment to choose reasonable of pump of water.
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