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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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may 1, 1973 - 1973年5月1日上海第一石油机械厂试制成功新的密封轴承三牙轮钻头。
Description:
1973年5月1日上海第一石油机械厂试制成功新的密封轴承三牙轮钻头。
Added to timeline:
工业大事年表
By
Loo Qoo
2 Sep 2023
1
0
731
Date:
may 1, 1973
Now
~ 53 years ago
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