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Two methods of unsupported distance measurement were discussed when the target nadir could not be reached.The measurement principles, the calculation equations and the measurement error were analyzed.
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摘要结合工作实践探讨了在目标点天底无法到达时,高压输电线路的两种悬高测量方法,并对其测量原理、计算公式及测量误差进行了分析;
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