中线

The shape of cross-section is an ellipse folded in half through one symmetry axis, and the axis keeps perpendicular with pinacoid-view.

断面形状为沿对称对折的椭圆，此对称垂直于截面，其方向与平面图上的流道中线无关。

Methods We designed the single incision on the postmedial line of the cranium and dissectted bluntly under aponeurosis of occipitofron talis muscle.

将手术切口设计在颅后中线上,从帽状腱膜深层钝性分离,进入颞区在颞浅筋膜深分离至眶外,充分上提颞部组织后切除多余头皮组织,最后分层缝合。

Findings: Smooth midline cavity separating the frontal horns of the lateral ventricles (anterior to the foramen of Monro) and appearing isodense with cerebrospinal fluid.

中线上位于脑室额角之间，孟氏孔之前的囊样病变，与脑积液呈等信号。

The underground diaphragm wall in Yellow River Undercrossing Project of the Middle Route in the South-to-North Water Diversion is the deepest and thickest one in China.

南水北调中线穿地下连续墙是国内最深最厚的地下连续墙,地质条件差,施难度大,施中存在较大的风险。