FIELD: pipeline cleaning. SUBSTANCE: hydrobarodynamic device for cleaning internal surfaces of pipelines has collar with two rows of circumferentially staggered spring members, which form wedge-shaped slots in the external ring, inner resilient element, rod and centering unit. Collar is provided with third external row of wedge-shaped movably mounted spring members, tapered ends of which are positioned in wedge-shaped slot. EFFECT: high quality and improved efficiency of cleaning operations. 2 cl, 4 dwg
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