why worry about radon? There is a pipe to let radon escape into

来源: Summer123 于 2012-11-05 19:52:53 [档案] [旧帖] [给我悄悄话] 阅读数 : (0 bytes)

回答: 请教大家，有氡气（radon)的房子可以买吗？由种菜忙于 2012-11-05 19:31:50

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