Its working principle, the signal tropism and the setting of indexing plate are introduced here with the calculating method of its speed ratio.

本文介绍车速里程表的工作原理、信号取向和标度盘的设定，给出了车速里程表速比的计算方法。

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Flexible and convenient mesh frame clamp orientation setting is useful to check up the printing plate accurately in highest speed.

灵活便捷的网筐式持定位装置，利于最快速度精确对版。

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