An united space datum line has been given.

给出统一的空间基准线。

A line of punch positions parallel to the Y datum line of a punch card.

基准线平行，在地平面或者基准平面上。

The vertical datum line set up by this system can be used to monitor deformation of the various building.

用这种垂准系统建立的高度较大的垂准基线，可以用于超高层建筑物施工和变形监测。

The L. P. G. is made of pay increase up line (alert line), pay increase datum line and pay increase down line.

而工资指导线由工资增长上线(警戒线)、工资增长基准线和工资增长下线组成。

Results Femoral shaft edges were obtained from both frontal and lateral X ray images successfully, and then datum line was se…

结果获得符合要求的骨骼边缘，完成股骨骨干段基准线的三维空间显示。