デトロイト・ガソリン
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石炭倉の天井でなぜ酸素濃度を測定する必要があるのでしょうか？私たちの石炭倉では石炭の厚さは10mmです
酸素濃度の上昇を防ぎ、粉塵爆発を防ぐ。
ありがとう。一般的に彼の酸素含有量はどれくらいで、大気中の酸素含有量と同じですか？
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