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1991年12月是月中国第一台四轴数控电火花成型机床在上海第八机床厂诞生。 (dec 1, 1991 – jan 1, 0)

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1991年12月是月中国第一台四轴数控电火花成型机床在上海第八机床厂诞生。

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工业大事年表

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dec 1, 1991

jan 1, 0

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