| http://www.w3.org/ns/prov#value | - A sledding system, comprising a track including support means defining a sledding path, and a plurality of glide elements carried by said support means and having exposed faces which together form a sledding surface, said glide elements being at least at said faces of a first material selected from the group composed of polyethylene, fluoro-containing polyalkylene, polymethylene-oxide, polyester,
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