FIELD: pipeline cleaning equipment. SUBSTANCE: piston has hollow split body with flexible expanding connector between piston parts, brushes with windows between them, set of magnets fixed on piston outer surface and collet. Piston body rotation mechanism has guiding rollers positioned at an angle to longitudinal axis of piston body, within which accumulating chute is pivotally secured to piston pin. EFFECT: increased efficiency, simplified construction and enhanced reliability in operation. 3 dwg
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