The subject of the invitation to tender is the manufacture, delivery and installation of metal components such as gratings, stairs, railings, platforms, covers, brackets etc. for the renewal of the sludge treatment of the Werdhölzli sewage treatment plant.

The subject of the invitation to tender is the manufacture, delivery and installation of metal components such as gratings, stairs, railings, platforms, covers, brackets etc. for the renewal of the sludge treatment of the Werdhölzli sewage treatment plant.