When the visitors type in the data their eyes are fixed across the vertical axis at the left to the input field.
当用户输入数据的时候，他们的眼睛固定在纵轴输入框左侧的交叉点上。
The input axis of the azimuth gyro under this condition is vertical, and pendulum unit is nulled.
在这样情况下方位陀螺的输入轴是处于垂直位置，同时摆锤单元在零位。
The input axis of the azimuth gyro under this condition is vertical, and pendulum unit is nulled.
在这样情况下方位陀螺的输入轴是处于垂直位置，同时摆锤单元在零位。
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