... 制轮器：trigger 制冷系数：refrigeration coefficient 制浆造纸工程：Pulp and Paper Engineering ...
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Carnot refrigeration coefficient 卡诺制冷系数
coefficient of refrigeration 冷冻系数 ; 制冷系数
maximum refrigeration coefficient 最大制冷系数
The main reasons are that its cold period is too long, its refrigeration coefficient is too low and its cost is too high.
其主要原因是其制冷周期长，制冷系数低，成本太高。
参考来源 - 太阳能吸附式空调系统试验研究·2,447,543篇论文数据，部分数据来源于NoteExpress
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