短語詞組短語Perpendicular to Plane 垂直于平面EKG axis perpendicular frontal plane EKG 電軸垂直于額平面completely perpendicular plane [數(shù)]完全垂直面H -perpendicular plane 鉛垂面W -perpendicular plane 側(cè)垂面V -perpendicular plane 正垂面perpendicular plane of projection plane 投影面垂直面perpendicular line of projection plane 投影面垂直線 返回 perpendicular plane