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2025-01-05The cable news channel Al Jazeera America, which debuted in 2013 to great fanfare when it promised to cover American news soberly and seriously, is shutting dow...
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2025-01-05The Celestial Globe浑象The celestial globe was an instrument for demonstrating astronomic phe-nomena in ancient China. The ancient Chinese people learned to make ...
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2025-01-04随着自动化市场需求的大大提高，工业机器人市场获得了更大扩展，除了传统的焊应用于外，机器人在机床上下料等多领域构建了广泛应用。
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2025-01-04在分布式控制系统(DCS)的时代之前，报警以软接线方式接至控制室墙体上加装的相同报警器面板。