When horizontal and vertical cutting may locate safely.

在水平和竖直切削时可安全定位。

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Take vertical section, cutting at 90 degrees. Cut at the previous.

取垂直分区，取90度角，发片往前带一片。

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Take vertical section, cutting at 90 degrees. Cut at the previous.

取垂直分区，取90度角，发片往前带一片。

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