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aug 29, 1952 - 1952年8月29日华东工业部举行奖励创造发明和合理化建议大会。

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1952年8月29日华东工业部举行奖励创造发明和合理化建议大会。

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工业大事年表

2 Sep 2023

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Date:

aug 29, 1952

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~ 73 years ago

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