6
Metal pipes; Metal pipe fittings; Metal water pipes; Pipes of metal; Stainless steel pipes; Pipe connections of metal; Pipe couplings of metal; Water pipe valves [metal]; Sprinkling pipes of metal; Pipe fittings [junctions] of metal; Valves of metal (Water pipe -); Compressed air pipe fittings of metal; Air pipes of metal for buildings; Ducts and pipes of metal for central heating installations; Metal valves for controlling the flow of fluids in pipelines; Metal valves for controlling the flow of gases in pipelines; Steel fabrications; Prefabricated houses of metal; Ventilating and air conditioning installations (Ducts of metal for -)
7
Pump installations; Compressors for air conditioners
9
Fire sprinklers; Sprinkler systems for fire protection
11
Air conditioners; Valves for air conditioners; Safety fittings for water pipes; Safety valves for water pipes; Valves being parts of sprinkler systems; Air conditioning apparatus; Air conditioning apparatus for industrial use; Combined heating and air conditioning apparatus
34
Pipes
37
Coating of pipes; Installation of pipelines; Installation of pipework systems; Installation of pipe systems for conducting of gases; Construction of steel fabrications
42
Design of pipelines; Technical design and planning of pipelines for gas, water and waste water