The invention discloses a double-effect ground source heat pump system.
本发明公开了一种双效的地源热泵系统。
Study on the performance of a direct expansion solar-assisted heat pump system;
本文建立了直接膨胀式太阳能热泵（直膨式太阳能热泵）系统的实验装置。
The fault tree of electric submersible pump system is established by deductive method.
用演绎法建立了潜油电泵系统的故障树。
The fault tree of electric submersible pump system is established by deductive method.
用演绎法建立了潜油电泵系统的故障树。
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