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jan 6, 1960 - 1960年1 月6日上海电焊机厂试制成功重达15吨的MR-500 钢轨对焊机，性能符合设计要求。

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1960年1 月6日上海电焊机厂试制成功重达15吨的MR-500 钢轨对焊机，性能符合设计要求。

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工业大事年表

2 Sep 2023

1

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688

Date:

jan 6, 1960

Now

~ 65 years ago

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