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dec 11, 1965 - 1965年12月11日上海轻工业研究所试制成功中国第一台“周期控制标准钟”。

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1965年12月11日上海轻工业研究所试制成功中国第一台“周期控制标准钟”。

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工业大事年表

2 Sep 2023

1

0

688

Date:

dec 11, 1965

Now

~ 59 years ago

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