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29 fev 1972 ano - 1972年2月29日 上海钟表元件厂制成优质合成毛表油，填补中国手表工业空白。

Descrição:

1972年2月29日 上海钟表元件厂制成优质合成毛表油，填补中国手表工业空白。

Adicionado na linha do tempo:

工业大事年表

ByLoo Qoo
2 set 2023
1
0
686

Data:

29 fev 1972 ano
Agora
~ 53 years ago
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