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20-6 statistics on r&d activities and patents of industrial enterprises
条目包含内容:2020年中国统计年鉴_20-6 statistics on r&d activities and patents of industrial enterprises 20-6 statistics on r&d activities and patents of industrial enterprises
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条目包含内容:2020年中国统计年鉴_20-6 statistics on r&d activities and patents of industrial enterprises 20-6 statistics on r&d activities and patents of industrial enterprises
