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nov 15, 1991 - 1991年11月15日国内最先进的碱性焊条自动生产线在上海电焊条总厂建成投产。

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1991年11月15日国内最先进的碱性焊条自动生产线在上海电焊条总厂建成投产。

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工业大事年表

2 Sep 2023

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Date:

nov 15, 1991

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~ 33 years ago

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