R22 is the best refrigerant, Environment is another thing.

来源: BigXXXX 2014-06-19 14:50:42 [] [旧帖] [给我悄悄话] 本文已被阅读: 0 次 (89 bytes)
回答: 修家里的空调 - 买冷媒R-22的证书色大胆小2014-06-18 18:43:42
So do not throw away your R22 unit becasue of fancy efficiency or environmental friendly.
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