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jun 14, 1957 - 1957年6月14日 35000伏高压电缆在上海电缆厂试制成功，通过国家鉴定。

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1957年6月14日 35000伏高压电缆在上海电缆厂试制成功，通过国家鉴定。

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工业大事年表

2 Sep 2023

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Date:

jun 14, 1957

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~ 68 years ago

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