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apr 30, 1956 - 1956年4月30日国内第一台管型塔式起重机在上海建筑机械制造厂试制成功。

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1956年4月30日国内第一台管型塔式起重机在上海建筑机械制造厂试制成功。

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工业大事年表

2 Sep 2023

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689

Date:

apr 30, 1956

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~ 69 years ago

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