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沼气 | |||
甲烷气体 | |||
沼气植物在炭化过程中产生的气体。主要残留在煤的夹层中,煤层内也常出现。沼气是无色、无臭、无味的可燃性气体,密度为 0.558 | |||
甲烷 |
methane gas : 21 phrases in 11 subjects |
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