According to the energy loss of every part of screw pump well, established system efficiency analysis model for the well.
根据螺杆泵井各个部分运动特点及能量损失情况，建立了螺杆泵井系统效率分析模型。
The most efficient work point of of the pump device was deduced after the analysis of the relationships between hydropower loss and hydropower efficiency in pump and pump device.
本文分析了泵及泵装置的水力损失和水力效率的关系，推求出了泵装置的最高效率工况点。
The system involves disaster monitoring, forecasting, prevention, resistance, control, loss assessment and efficiency analysis of disaster reduction.
其系统涉及到灾害的监测、预报、防御、抗御、治理、灾情评估和减灾效益的分析等环节。
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