Industry
Precursors for polymerisation, Chemical base materials, Chemicals, Pharmaceuticals & Plastics, Polytetrafluoroethylene (PTFE) and other fluorocarbon resins, Polytetrafluoroethylene (PTFE), Resins, synthetic, Filters, plastic, Chemical industry plant and equipment, Filters and strainers for the chemical industry, by use, Filters, exhaust pollution control