high-voltage transmission lines design
high-voltage transmission lines design
高压输电线路设计
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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Design and operation experience has shown that, the transposition of high voltage transmission lines would weaken the mechanical strength and increase the cost of its construction and operation.
但设计和运行经验证明，高压线路完全换位会减弱线路的机械强度，并增加其建造和运行的费用。
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