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apr 3, 1989 - 1989年4月3日国家重点建设项目——中国与比利时合营的数字电话交换系统工程在上海通过国家验收。
Description:
1989年4月3日国家重点建设项目——中国与比利时合营的数字电话交换系统工程在上海通过国家验收。
Added to timeline:
工业大事年表
By
Loo Qoo
2 Sep 2023
1
0
731
Date:
apr 3, 1989
Now
~ 37 years ago
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