411 REFERENCE · Wiktionary
Norwegian coupling
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
Due to it being developed in Norway c. 1870.
Noun
en rail 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.
en chopper coupling claw hammer coupling