用于添加多达4个垂直坐标尺寸。将一个端点连接到基准线，一个端点连接到第一个部件。

Use to add up to 4 vertical ordinate dimensions. Attach one endpoint to baseline and one to first feature.

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垂直陀螺利用一个陀螺仪作为积分装置以得摇摆不定的重力基准线的平均位置。

The gyro vertical utilizes a gyroscope as an integrating device to obtain the average position of a pendulous gravity reference .

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