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The Dual Edge Snowboard (DES) is a technical categorization of a general snowboard concept and technology, where a device or mechanism creates two simultaneously ridden edges for a snowsport equipment that allows the user to ride in a similar fashion to the basic (classic) snowboard. ==Brief history== These systems have been around since the commercial beginning of snowboarding, circa 1984.〔http://www.smi.ethz.ch/education/courses/studentpresentationsUI/Snowboarding_Barnetta_Frost2006.pdf〕 Possibly the earliest successful attempt was the SwingBo.〔(YouTube - The Swingbo )〕〔(Oldsnowboards.Com Gallery :: Swingbo )〕〔(YouTube - probando un swingbo )〕 The SwingBo was created by the Struck〔(Called Swingbo )〕 brothers of Germany. The original equipment can still be found on internet auction sites or as the foundation for some paraplegic ski chairs. (Deuce Snowboards ) introduced a modern version of the DES that has undergone extensive engineering design and testing. According to Deuce Snowboards, the DES is the next evolutionary step of the snowboard, but it appears that they are evolving the ski sport as well. There are various other attempts, which typically, were only patented, and were likely not technically or production viable. For example, one was a more modern version like the Deuce Snowboard, it was fundamentally based on a gear mechanism, instead of a four-bar mechanism on which the Deuce DES, and possibly, the SwingBo are based. These systems are obviously a hybrid of skis and the classic snowboard, with the intent of delivering the advantages of both. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Dual Edge Snowboard」の詳細全文を読む スポンサード リンク
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