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1. The compound catenary suspension line is used to connect the two towers in a power transmission system.
复合悬挂线用于连接输电系统中的两个塔。
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2. The engineer designed the compound catenary suspension line to optimize the transmission efficiency.
工程师设计了复合悬挂线，以优化传输效率。
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3. The compound catenary suspension line was installed to prevent the cable from being damaged bywind and rain.
安装复合悬挂线是为了防止电缆因风和雨而受损。