Definition of coupling rod in English:

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coupling rod

Entry from British & World English dictionary

noun

A rod which couples the driving wheels of a locomotive, enabling them to act as a unit.
Example sentences
  • Additional clearance can be generated by counterboring the coupling rod to accept the head of the bush.
  • The big end bearing on the right hand coupling rod had some white metal repaired, by puddling up.
  • If you haven't built it yet - do so - fuse it to the coupling rod or the wheel - it doesn't matter which.
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