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1·Foreign advanced pump unit, efficiency can exceed 90%.

国外先进的水泵机组，效率可超过90%。

2·The cause for the vibration of the pump unit was discussed.

针对泵机组的各部件存在的振动，分析了产生振动的原因。

3·So it cannot accurately show the property of gasoline pump unit.

这就不能准确地反映机组性能。

4·Centrifugal pumps are used usually as pump unit in crude oil transportation engineering.

在原油输送工程中，常用离心泵作为原油输送泵组。

5·The advantages and disadvantages of screw compressor ammonia-pump unit are analyzed also.

论述了螺杆氨泵机组的优缺点。

6·Takes a heat pump unit to calculate by the model. Obtains its performance under frosting condition.

根据该模型选择某种热泵进行了计算，得到了该热泵在结霜工况下的性能。

7·In recent years, is committed to water, ground source, air source heat pump unit development and use.

近年来致力于水源、地源、空气源热泵机组开发和利用。

8·The experiments for different airflow were conducted on an air-to-water heat pump unit and discussed.

采用试验方法研究了风量变化对中大型风冷热泵机组结霜工况性能的影响。

9·But all this depend on the steady, safe and highly efficient running of ground source heat pump unit.

但是，这又依赖于热泵机组的稳定、安全、可靠、高效的运行。

10·The characteristics of centrifugal pump unit given by pump specimen are obtained by testing with water.

泵样本上给出的离心泵组的特性都是用水试验得出的。