FLEXIBLE PIPES, NOT OF METAL, AND PLASTIC TUBES FOR LINING PASSAGEWAYS BEING EXTRUDED IN SHEET FORM AND HELICALLY SEAMED INTO TUBE FORM AND HAVING SPIKES, PROTRUSIONS OR SPACED FORMATIONS ON ONE SURFACE; EXTRUDED PLASTICS OR POLYMER MATERIAL IN SHEET FORM; PLASTICS OR POLYMER SHEET MATERIAL HAVING SPIKES OR PROTRUSIONS ON ONE SURFACE THEREOF

Flexible pipes, not of metal; flexible plastic tubes for lining passageways; extruded plastics and polymer material in sheet form for use in manufacturing and general industrial use

Installation of flexible lining for rehabilitation, rejuvenation, repair and lining of pipelines, sewers, and passageways