It is either engine driven, or powered by the harvestors themselves.

它要么是由发动机驱动的，要么是由收割者自己提供动力。

An energy calculation model is established for the gas engine driven heat pump based on the experiment of components.

在对燃气机热泵部件进行实验的基础上，建立了燃气机热泵系统能耗计算模型。

The gas engine driven heat pump (GHP) is driven by the gas engine using gas, and driven the compressors for refrigeration circle.

燃气热泵是利用燃气驱动燃气发动机，并带动压缩机进行制冷循环的空调装置。

A model of a gas engine driven air to water heat pump based on the measured data of the gas engine and compressor was established.

以某发动机和压缩机的实测数据为依据，对一燃气机驱动空气-水热泵机组建立了模型。

Primary electrical power is provided by two engine driven generators which supply three-phase, 115 volt 400 cycle alternating current.

主电力是由两个发动机驱动发电机供应三相，115伏400周期交流电。