The constructing method of GPS height control network of city was discussed.

针对城市测量控制网的特点,探讨了利用GPS技术建立城市高程控制网的方法.

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A plasma torch's height control system which is based on plasma arc voltage measuring is introduced.

设计了一种基于等离子电弧电压检测的割炬高度控制系统.

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The height control is the key points to the construction quality of bridge closure.

预应力箱梁施工技术含量高、施工难度大,而其高程控制又是施工技术控制的关键之一.

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