Flexible hoses, not of metal; Hoses made of non-metallic materials for on-site renovation and lining of pipelines and sewer pipes; Hoses made of non-metallic elastic material for resin impregnation, lining, and pipe rehabilitation; Hoses made of non-metallic polymer coating, laminate, or bonding for repairing and maintaining pipelines and sewer pipes; Hoses made of non-metallic composite for sewer and pipeline rehabilitation; Hoses made of non-metallic composite for on-site servicing of pipel...