File:Roper steam velocipede 1886 The Standard Reference Work.png
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![File:Roper steam velocipede 1886 The Standard Reference Work.png](https://upload.wikimedia.org/wikipedia/commons/thumb/b/b8/Roper_steam_velocipede_1886_The_Standard_Reference_Work.png/800px-Roper_steam_velocipede_1886_The_Standard_Reference_Work.png?20110206170326)
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