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31 jul 1970 ano - 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。

Adicionado na linha do tempo:

工业大事年表

2 set 2023

1

0

686

Data:

31 jul 1970 ano

Agora

~ 55 years ago

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