Compared with the traditional electric-powered wheelchair,people are paying more attention on intelligent wheelchair.Whi......

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基于热弯玻璃的圆锥近似Wolter-I型X射线聚焦望远镜采用在凸柱面镜模具上热弯超薄玻璃的反射镜片制作方式, 柱面镜低频面形误差和......