短语词组短语heat transfer pump coupling 载热剂泵联轴器heat drain pump 排热泵heat -pump unit 水源热泵机组heat cycle pump 热循环泵heat transfer pump 载热剂泵residual heat removal pump 余热排出泵;余热导出泵heating heat -pump 供热热泵heat changing pump 冷热水泵 返回 heat pump