内部机构采用平形凸轮设计，分割角度准确，换刀速度快；

This inside mechanism employs parallel cam, featuring high indexing accuracy and fast tool change;

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关于钻戒使用的最早记录中有一条是奥地利大公马克西米利安向勃垦地的玛丽求婚时，赠与了一个M形又薄又平的钻石镶嵌的戒指。

One of the first recorded uses of a diamond engagement ring was Archduke Maximilian of Austria's proposal to Mary of Burgundy with a ring set with thin, flat pieces of diamonds in the shape of an "M."

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尾平翼特征是顶端有一个上端后掠的垂直安定翼和锥形尾垂翼具有一个钝形顶端。

The tail flats feature swept-back tips forward of the swept-back and tapered fin with a blunt tip.

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