35
Retail or wholesale services for water pipes of metal and parts and accessories thereof, water distribution installations and parts and accessories thereof, regulating accessories for water or gas apparatus and pipes, mixer taps for water pipes, regulating and safety accessories for water apparatus, washers for water taps, tap water faucets and valves for water pipes; retail or wholesale services for water pipes of plastic and parts and accessories thereof, pipe couplings of metal, adhesive tapes for water pipes, metal hardware, valves of metal, metal junctions for pipes, metal flanges, metal joinery fittings, junctions for pipes (not of metal), electrical insulating materials, washers of rubber or vulcanized fiber, rubber stoppers, water pipe valves (not of metal or plastics)
37
Construction; plumbing; pipeline construction and maintenance; construction of sewerage systems; installation of gas and water pipelines; installation of water pipes; construction consultancy; cleaning and maintenance of sewerage systems; cleaning and maintenance of gas and water pipelines; cleaning and maintenance of water pipes
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