常見(jiàn)例句Keywords space welding;equi-diametral three-cylinder electrostatic unipotential lens;CAD; 空間焊接;等徑三圓筒單透鏡;計(jì)算機(jī)輔助設(shè)計(jì);Keywords spac e welding;equi-diameter three-cylinder electrostatic unipotential lens;CAD; 空間焊接;等徑三圓筒單透鏡;計(jì)算機(jī)輔助設(shè)計(jì);unipotential emittig surface 等電位發(fā)射面unipotential cathode 等電位陰極unipotential electrostatic lens 單電位靜電透鏡 返回 unipotential