Sag is one of the most important parameters of power transmission line operation; and it will directly affect the security and the reliability of the electric network.
弧垂是输电线路运行的一个重要参数，直接关系到电网运行的安全性和可靠性。
Sag is one of the most important parameters of power transmission line operation; and it will directly affect the security and the reliability of the electric network.
弧垂是输电线路运行的一个重要参数，直接关系到电网运行的安全性和可靠性。
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