Spiral toboggan of laminated polyester elements - which can be built up to increase size as required

摘要

Spiral toboggan is formed by an assembly of elements of laminated polyester; all the elements may be made in the same mould. Pref. the elements of an assembly do not nest, but are mutually to constitute a compact package. The elements can be adjoined together, theoretically indefinitely, to make a form of spiral on the ground. The elements may be of different colours.