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ISO 8755:1986WithdrawnCommercial road vehicles — Mechanical connections between towing vehicles and trailers — 40 mm drawbar couplingISO 10061:1991WithdrawnRoad vehicles — Trailers, including caravans — Height of coupling headISO 11406:1993WithdrawnCommercial road vehicles — Mechanical coupling between towing vehicles with rear-mounted coupling and drawbar trailers — InterchangeabilityISO 11407:1993WithdrawnCommercial road vehicles — Mechanical coupling between towing vehicles with coupling mounted forward and below, and centre-axle trailers — InterchangeabilityISO 13044-2:2013WithdrawnRoad vehicles — Fully automatic coupling systems 24 V (FACS) for heavy commercial vehicle combinations — Part 2: 50 mm fifth wheel couplings — Electrical and pneumatic interface