WBuffers and chain coupler
WC-AKv coupler
WDouble switching
WDrawbar (haulage)
WDual coupling
WJanney coupler
WNorwegian coupling
WMiller Platform
WNorwegian coupling
WRailway coupling
WRailway coupling by country
WRailway coupling conversion
WSA3 coupler
WScharfenberg coupler
WTightlock coupling