Legal name: Oy Konwell Ab
Helsinki, Southern Finland
Hagan, Akershus
Lysaker, Akershus
Trollasen, Akershus
Sola, Rogaland
Legal name: Haakon Ellingsen AS
Rud, Akershus
Engineering, design and production of valves.
Agotnes, Hordaland
Voeyenenga, Akershus
Moss, Oestfold
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