To the edge of left and right spinous foramen are .7±. mm and .0±.7 mm respectively.
To the edge of left and right spinous foramen are .7±. mm and .0±.7 mm respectively.
到棘孔内缘分别为 .7±. mm, .0±.7 mm;
To the edge of left and right spinous foramen are .7±. mm and .0±.7 mm respectively.
到棘孔内缘分别为 .7±. mm, .0±.7 mm;