正文

順便提醒大家買房注意查radon, 美國non-smoker 1st reason for lung cancer

(2009-07-01 20:48:57) 下一個
4.0 is formally specified as warning line.

But actually, long exposure to radon level at 2.0 can be problematic too.
[ 打印 ]
[ 加入書簽 ]
閱讀 () ┆ 評論 (1)
評論
目前還沒有任何評論
登錄後才可評論.