6
Tubes of non-precious metals; tubes of non-precious metals with non-metallic coating or covering; metal tube fittings for interconnection of tubes or for use with armatures; metal hose fittings; metal pipe fittings; water supply and sanitary systems comprising metal pipes; metal insulation pipes; drain pipes made of metal; metal junctions for pipes; metal pipe clips; metal pipe collars; metal pipe connectors; metal pipe couplings and joints; metal pipes; metal pipes and fittings therefore; metal water pipes
9
Electronic controls for controlling and adjusting floor and radiator heating systems and snow and ice prevention systems; computer software for designing floor and radiator heating systems and snow and ice prevention systems; heat meters; welding electrodes
11
Heating, cooling and sanitary devices primarily comprised of pipes, water distributors and plumbing fittings, namely valves, drains and manifolds; tap water systems primarily comprised of pipes, tubes, and plumbing fittings, namely valves; floor and radiator heating systems, namely pipes, valves and manifolds and manual or electronic control devices, sold as a unit; snow prevention systems in the nature of heaters, namely pipes, valves, manifolds and manual or electronic control devices, sold as a unit; drain water systems namely pipes and plastic chambers for drainage purposes; liquid water management systems namely water treatment plants for waste water, primarily comprised of plastic tanks for sedimentation and water purification
17
Plastic tube and pipes, namely corrugated, profile and multi-walled tubes and pipes for electrical installation and cable insulation and; protection; flexible pipes, not of metal; insulation for underground pipes and tanks; insulation jackets for industrial pipes; junctions not of metal for pipes; non-metal pipe muffs and collars; non-metal pipe couplings and joints; non-metal tubing and tubing couplings for joining and terminating pipes; pipe gaskets; pipe joint compound; pipe joint sealant; plastic pipes for conveying natural gas; plastic plumbing pipes; rings of rubber for use as pipe connection seals; seals for pipe connections for plumbing pipes; tubing consisting of plastic films for rehabilitating pipelines and plumbing systems; watertight rings for plumbing pipes; extruded non-metallic products in the form of sheets and tubes for use in manufacturing; plastic inextruded form for general industrial use; resins in extruded form for general industrial use; foil insulation for use in building and construction; foam sheeting for use as a building insulation; metal foils for building insulation; glass fibers for use in the manufacture of building insulation; sheets of plastic fabric used as an insulating infiltration barrier in building construction; heat and impact insulation plates for use in building and construction; plastic insulation pipes; water supply and sanitary systems comprising plastic pipes; plastic water pipes; plastic gaspipes
19
Nonmetal water pipes, gas pipes, sewer pipes and rigid pipes; panels for floor heating assembly
20
Elbows not of metal for pipes, non-metal pipe fittings, non-metal pipes and cable clips, non-metal pipe clips; nonmetal water pipes; nonmetal hose fittings, nonmetal pipe fittings
37
Construction planning; construction and repair of buildings; installation and repair of piping and tubing in construction
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