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may 1, 1921 - 1921年5月1日 为防止上海工人举行庆祝活动上海军警如临大敌、戒备森严，反映了当权者对日益兴起的工人力量的忧惧。

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1921年5月1日 为防止上海工人举行庆祝活动上海军警如临大敌、戒备森严，反映了当权者对日益兴起的工人力量的忧惧。

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工业大事年表

ByLoo Qoo
2 Sep 2023
1
0
731

Date:

may 1, 1921
Now
~ 105 years ago
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