Translations:Hauptseite/293/en

In principle, the drainage channels were aimed at the specialised building materials trade, as well as construction companies. Building authorities and industrial architects were also interested.

It was understandable that special advertising efforts were being made with all planning authorities in mind, and that users and architects were also being addressed directly. Federal and state building authorities, as well as road construction authorities were sent brochures, as were mineral oil companies that build petrol stations. In addition, the car industry was addressed because it was involved in the planning of garages.