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

來源: Summer123 於 2012-11-05 19:52:53 [檔案] [舊帖] [給我悄悄話] 閱讀數 : (0 bytes)

回答: 請教大家，有氡氣（radon)的房子可以買嗎？由種菜忙於 2012-11-05 19:31:50

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