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单词 return air
释义

Definition of return air in English:

return air

noun
  • 1Mining air contaminated with coal dust and gas which is pumped out of a mine.

  • 2Air which is returned from a heated or refrigerated space for processing and recirculation.

Origin

Early 19th century; earliest use found in The Edinburgh Encyclopaedia.

Definition of return air in US English:

return air

noun
  • 1Mining air contaminated with coal dust and gas which is pumped out of a mine.

  • 2Air which is returned from a heated or refrigerated space for processing and recirculation.

Origin

Early 19th century; earliest use found in The Edinburgh Encyclopaedia.

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更新时间:2025/1/31 5:51:43