An Experimental Study on Oil Return of PAG and POE from a Liquid Line for a $CO_2$ Refrigeration System
($CO_2$ 냉동시스템용 액상배관에서 PAG 및 POE 오일회수 특성에 관한 실험적 연구)
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- The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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- v.38 no.12
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- pp.61-65
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- 2009