短語詞組短語Perpendicular to Plane 垂直於平麪EKG axis perpendicular frontal plane EKG 電軸垂直於額平麪completely perpendicular plane [數(shù)]完全垂直麪H -perpendicular plane 鉛垂麪W -perpendicular plane 側(cè)垂麪V -perpendicular plane 正垂麪perpendicular plane of projection plane 投影麪垂直麪perpendicular line of projection plane 投影麪垂直線 返回 perpendicular plane