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6 jan 1960 ano - 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。

Descrição:

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。

Adicionado na linha do tempo:

工业大事年表

2 set 2023

1

0

686

Data:

6 jan 1960 ano

Agora

~ 65 years ago

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