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词汇 air hole
释义

Definition of air hole in English:

air hole

noun ˈɛː həʊl
  • 1A hole or passage to admit air; especially a hole in a layer of ice formed over deep water, providing a breathing-place for aquatic animals or divers.

  • 2Metallurgy. A cavity in a metal casting, produced by the escape of air through the liquid metal. Now rare.

Origin

Early 17th century; earliest use found in Contract. From air + hole.

Definition of air hole in US English:

air hole

nounˈɛː həʊl
  • 1A hole or passage to admit air; especially a hole in a layer of ice formed over deep water, providing a breathing-place for aquatic animals or divers.

  • 2Metallurgy. A cavity in a metal casting, produced by the escape of air through the liquid metal. Now rare.

Origin

Early 17th century; earliest use found in Contract. From air + hole.

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