A coupling is a mechanical device used to connect two train cars or a locomotive to a car, allowing them to be linked together so they can move as one unit. The coupling ensures that the cars stay securely attached while the train is in motion, and it allows the train to transfer power and braking force across the cars. Different types of couplings exist, but they all serve the same basic purpose of holding the cars together safely while allowing them to be separated when needed. Couplings are crucial for train operations, ensuring the smooth and safe movement of the train as a whole.

“coupling”的英语定义和含义

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