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第2部 特定物質の大気中濃度HCFC 1~26 0.02~0.12 1,1,1-トリクロロエタン(CH3 CCl3) 5 0.12 塩素系 塩化メチル 1.0 0.02 ハロン1301 65 16 ハロン1211
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