H2のこの含有量は危険ですか？温度は200度以上です
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ボイラーはガスボイラーで、ガスの組成は以下の通り：CO2：1.87％、CO：9.164％、C2H2：0.596％、CH4：0.357％、H2：10.63％、H2O：43.21％、N2：33.672％、AR：0.418％
ガスボイラーから出てきたもので、完全燃焼しているはずなので酸素含有量は非常に低いはずです
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