FIELD: railway construction and maintenance. SUBSTANCE: machine has four frames resting on running bogies, device to remote old sleepers and device to install new sleepers, both mounted on first frame in direction of working, rail welding set and device for replacement of rail lengths. Second frame in direction of working has equipment for transportation of new rails. In process of movement, machine replace 5 old sleepers by new ones and, before laying the rails, it welds up rail lengths and brings their temperature to value requires for laying. Old rail lengths are removed after placing new sleepers using the old rail lengths as guides. EFFECT: enhanced quality and convenience of operation. 7 cl, 4 dwg
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