Well, you save hundreds of heating bill every year.

来源: borisg 于 2015-02-12 14:26:27 [档案] [博客] [旧帖] [给我悄悄话] 阅读数 : 0 (0 bytes)

回答: if labor is 200-300 per day, it could be about $1250-1750.估计我人工算由 3apples 于 2015-02-12 14:24:24

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• 是的，投资不大，但是很值得。 -3apples- ♀ (0 bytes) () 02/12/2015 postreply 14:51:50

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