Jisho

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Noun
1. connector; coupler
Wikipedia definition
2. Railway couplingA coupling (or a coupler) is a mechanism for connecting rolling stock in a train. The design of the coupler is standard, and is almost as important as the track gauge, since flexibility and convenience are maximised if all rolling stock can be coupled together. The equipment that connects the couplings to the rolling stock is known as the draft gear.
Read “Railway coupling” on English Wikipedia
Read “連結器” on Japanese Wikipedia
Read “Railway coupling” on DBpedia

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