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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
May 31, 2026
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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。
Description:
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。
Added to timeline:
工业大事年表
By
Loo Qoo
2 Sep 2023
1
0
731
Date:
jan 6, 1960
Now
~ 66 years ago
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