摘要 |
The tower (31) has walls made of individual wall sections, where wall sections are partly made of a timber material, which are connected to each other by connecting devices. The wall sections are arranged to a helix in a fixed manner. The tower has a coating of plastic, plastic plate, fabric or textile, where plastic is polypropylene, polyurethane, polyvinyl chloride, polyester, polycarbonate or polyethylene. |