常見例句雙語例句Fourth step, to the host pumping a vacuum, plus the amount of refrigerant oil and refrigerant.第四步，給主機抽真空，加適量冷凍油和冷媒。jnslshwx.comMain automotive air conditioning compressor, refrigerant, refrigerant oil, compressor clutch assembly, Shell Oil and so on.主營汽車空調(diào)壓縮機、雪種、雪種油、壓縮機離合器總成、殼牌機油等。company.china.alibaba.comThe energy efficiency mechanism of Polarized Refrigerant Oil Additive(PROA) is analyzed. Some disputes in study about PROA recently are discussed.本文分析了極化冷凍機油添加劑（PROA）的節(jié)能機理，討論了目前對極化冷凍機油添加劑研究中存在的一些爭議。 返回 refrigerant oil