Norwegian coupling

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English

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English Wikipedia has an article on:
Wikipedia

Etymology

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Due to it being developed in Norway c. 1870.

Noun

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Norwegian coupling (plural Norwegian couplings)

  1. (rail transport) A manually operated coupling at each end of some narrow-gauge railway rolling stock, consisting of a central buffer incorporating a hook that drops into a slot in the opposing central buffer.
    Synonyms: chopper coupling, claw hammer coupling