Manufacture of finished products in plastic: tubes, pipes and accessories of plastic piping
Manufacture of piping accessories in steel: flat faced or welding neck flanges forged in steel, accessories to weld end to end in steel, threaded and other accessories in steel
Drilling, turning, countersinking, shaving, planing, lapping, broach, dressing, sawing, grinding, sharpening, etc. of metallic pieces
Setting of electric cables and appliances
Production of steam boilers, with the exception of boilers used in central heating
Surfacing metals
Working by stock removal of metals
Electro-technical installation works at buildings
Non-specialised wholesale
Retail trade in sanitary products and sanitary installation materials in specialised shops
Engineers and similar technical advisors, with the exception of surveyors
Other types of business services
Electro-technical installation works, with the exception of those executed at buildings
Production of other pharmaceutical products
Production of synthetic plates, sheets, tubes and profiles
Production of pipes, tubes, hollow profiles and their steel fittings
Production of metal works for construction and parts thereof