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  • The utility model relates to a drawing implement which is capable of drawing a parabolic curve and hyperbolic curve.

    本实用新型是一种画抛物线和双曲线的画图工具。

    youdao

  • The utility model relates to a drawing implement which is capable of drawing a parabolic curve and hyperbolic curve.

    本实用新型是一种画抛物线和双曲线的画图工具。

    youdao

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