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Directives concerning the protection of telecommunication lines against the adverse effects of elect
出版社：Geneva : International Telecommunication Union, 1952.
出版年：1952
作者：The International Telephone Consultative Committee and The International Telegraph Consultative Comm
资源类型：图书
细分类型：西文文献
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Directicves : concerning the protection of telecommunication lines against harmful effects from elec
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Wood poles for overhead lines (power and telecommunication lines).
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  • 出版年：1953