rich gas heating with flue gas rarefaction in coke ovens
稀疏（区）
rarefaction【声】
暂无补充释义。
rarefaction【声】
暂无补充释义。
rich gas heating with flue gas rarefaction in coke ovens
rarefaction of bone
rarefaction
rarefaction
rarefaction state【物】
rarefaction region【地物】
rarefaction
rarefaction of air