- DOSPEL Leader of Ventilation
- Address:Lesna 156 Czestochowa Poland
- Wentech
- Address:Rzemieslnicza 6 Imielin Silesia 41-407 Poland
- Pam-Zdzislaw Niedzialek
- Address:Rozkoszna 6 Warsaw Mazowieckie 04883 Poland
- Dospel z o.o
- Address:lesna 156 czestochowa 42-200 Poland
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