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结构混凝土性能现场检测技术
【出 处】
:
建筑科学
【发表日期】
:
2011年z1期
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随着我国科学技术的不断进步,步进电机被广泛应用于工业生产与生活中。近年来,电力技术、微机技术的快速发展,以及控制理论的也越来越完善,这使得步进电机在各方面都也得到了有效