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单词 reciprocating engine
释义

WordReference Random House Unabridged Dictionary of American English © 2024
reciprocating en′gine, 
  1. Mechanical Engineeringany engine employing the rectilinear motion of one or more pistons in cylinders. Also called displacement engine, piston engine. 
  • 1815–25

Collins Concise English Dictionary © HarperCollins Publishers::
reciprocating engine n
  1. an engine in which one or more pistons move backwards and forwards inside a cylinder or cylinders
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