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B62D53/04—Tractor-trailer combinations; Road trains comprising a vehicle carrying an essential part of the other vehicle's load by having supporting means for the front or rear part of the other vehicle
B62D53/06—Semi-trailers
B62D53/061—Semi-trailers of flat bed or low loader type or fitted with swan necks
B62D53/062—Semi-trailers of flat bed or low loader type or fitted with swan necks having inclinable, lowerable platforms; Lift bed trailers; Straddle trailers
B62D53/065—Semi-trailers of flat bed or low loader type or fitted with swan necks having inclinable, lowerable platforms; Lift bed trailers; Straddle trailers inclining platforms by detachable or folding swan necks
B—PERFORMING OPERATIONS; TRANSPORTING
B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS