6
Tubes of metal, metallurgy pipes, mouldings for building
9
Instruments and apparatus for measuring gas and liquids
11
Hydrants, steam-generating and water supply apparatus
37
Provision of servicing and repair services concerning detection of leaks in gas and liquid tube systems
40
Waste water treatment; treatment of materials
42
Scientific and technological services and related research and design services, in particular in the field of detection of leaks in tube systems for gas and liquids; industrial analysis and research services; consulting concerning environmental protection
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