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jul 31, 1970 - 1970年7月31日是日上海照相机厂制成中国第一架中心快门千分之一秒的单镜头反光式 120高精密度照相机。

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1970年7月31日是日上海照相机厂制成中国第一架中心快门千分之一秒的单镜头反光式 120高精密度照相机。

Added to timeline:

工业大事年表

2 Sep 2023

1

0

731

Date:

jul 31, 1970

Now

~ 55 years ago

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