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link and pin coupler

noun
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Definition of link and pin coupler

: an early device for coupling railroad cars consisting of a heavy metal pin inserted through a metal link

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“Link and pin coupler.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/link%20and%20pin%20coupler. Accessed 24 Oct. 2020.

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