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may 21, 1990 - 1990年5月21日 上海特种灯泡二厂和上海轻工研究所联合研制成功双U形节能灯弯管机填补国内空白。
Description:
1990年5月21日 上海特种灯泡二厂和上海轻工研究所联合研制成功双U形节能灯弯管机填补国内空白。
Added to timeline:
工业大事年表
By
Loo Qoo
2 Sep 2023
1
0
731
Date:
may 21, 1990
Now
~ 36 years ago
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