It introduced the principle of compensator of total station and pointed out how to exactly use a total station to decrease the influence of the vertical axis tilt error.
介绍了补偿器的原理；指出了在实际工作中如何正确使用全站仪以减少竖轴倾斜误差对测量结果的影响。
The side-mounted camera allows an uninterrupted view beneath the installation and its 180-degree tilt axis provides greater vertical scan.
侧装式摄像机能不间断查看底部安装，180度倾斜轴可以提供更大的垂直扫描范围。
The side-mounted camera allows an uninterrupted view beneath the installation and its 180-degree tilt axis provides greater vertical scan.
侧装式摄像机能不间断查看底部安装，180度倾斜轴可以提供更大的垂直扫描范围。
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