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结构为单线芯，采用多股软导线复绞制成。
For a single-core structure, a multi-unit made of soft wire-cutter.
youdao
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安装占地面积小，比软导线占地面积节约1/3；
Small mounting area, it covers an area of 1/3 more than soft wire.
youdao
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安装占地面积小，比软导线占地面积节约1/3；
Small mounting area, it covers an area of 1/3 more than soft wire.
youdao