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27 sett 1968 anni - 1968年9月27日上海钟厂试制成功中国第一台音叉钟。

Descrizione:

1968年9月27日上海钟厂试制成功中国第一台音叉钟。

Aggiunto al nastro di tempo:

工业大事年表

2 set 2023

1

0

688

Data:

27 sett 1968 anni

Adesso

~ 57 years ago

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