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BS 215-2-1970中英文版
BS 215-2-1970 架空输电用铝绞线及钢芯铝绞线 第二部分 钢芯铝绞线（中文版）.pdf
BS 215-2-1970 Specification for aluminium conductors and aluminium conductors, steel-reinforced for overhead power transmission. Aluminium conductors.pdf
