Mr. Brown worked in a factory of a small town. He had been there for twenty years before one day he was sent to the capital for important business. He was quite excited because he had never been there before. Before he set off he asked his wife and three daughters if they wanted him...
本发明涉及霍尔推力器,包括其的空间设备及其使用方法.所述霍尔推力器包括:呈环形的导磁外壳;圆片结构的导磁底板,其与导磁外壳围成圆柱形内部空间;沿轴向设置于内部空间的中心部的内磁元件;位于内磁元件顶部的导磁内芯;以及内套筒,其主体部分为中空筒状,用于放置内磁元件和导磁内芯,内套筒在主体部分的底部设有圆...