Switches and Crossings: Formulae for Ascertaining the Angles of Crossings, the Lengths of Switches, and the Distances of the Points of the Crossings and the Heels of the Switches from the Springing of the Curve

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カテゴリ/定価/発売日 本/3308円/2010-04-02 アクション (残り0枚)