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基础平面控制网
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基础平面控制网
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foundation plane control network
基础平面控制网
在铁路框架控制网或国家高等级平面控制点的基础上,沿线路走向布设,按卫星静态相对定位原理建立,为线路平面控制网提供起闭的基准,一般简称CPⅠ。
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hydrogeological survey
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hydrogeological type of ore deposits
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hydrogeological well pipe
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Hydrogeology & engineering geology
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hydrogeololgical condition of ore district
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hydrographic surveying and charting equipment
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