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29 Okt 1978 Jahr - 1978年10月29日上海异型钢管厂试制成功不锈钢外螺纹驱动软管，填补国家空白。

Beschreibung:

1978年10月29日上海异型钢管厂试制成功不锈钢外螺纹驱动软管，填补国家空白。

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工业大事年表

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29 Okt 1978 Jahr
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~ 46 years ago
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