During transmission line construction, sag observation is an important control item of stringing.

在输电线路施工中，弧垂观测是架线分部工程中重要的控制项目。

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During transmission line construction, sag observation is an important control item of stringing.

在输电线路施工中，弧垂观测是架线分部工程中重要的控制项目。

youdao