FIELD: pipe line engineering. SUBSTANCE: device has a hollow shaft mounted on the base. The base is also provided with a frame with feeding rollers and drum that has no drive, disk that rotates about the hollows shaft, and disk for switching the conditions of operation. The letter disk interacts with the base or rotatable disk. The rotatable disk is set in rotation by one of two reversing clutches. EFFECT: enhanced efficiency. 3 dwg
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