Word forms: (regular plural) couplings
( Automotive engineering : Vehicle components , Bodywork, controls, and accessories )
A coupling is a device which is used to join two vehicles together.
Before driving away, re-check the trailer coupling.
Brakes must be checked before towing, and all fittings, couplings, and safety chains need to be securely fastened.
This coupling will allow a trailer to do a full turn without any resistance, and the movement up
and down is ample.
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