The Beijing Fundamental Bench Mark (BFBM) is an important reference datum in the elevation control network in China.
北京水准原点是我国高程控制网中的一个重要基准点。
The coordinate reference datum on which precision GPS survey is based, is ITRF International Terrestrial reference Frame that IERS offers.
高精度GPS测量所依据的坐标参考基准，是由IERS所提供的ITRF国际地球参考框架。
This paper approaches the reference datum of GPS and electronic map from concepts model, and analyses the basic relations of coordinate transformation.
从概念模型的角度探讨了GPS和电子地图的参考基准问题。
The method includes forming physical reference datum directly on an individual silicon die module, and positioning the individual die modules on a temporary holder.
该方法包括直接在单独的硅裸片模块上形成物理参考基准，以及将该单独的裸片模块定位于临时固定器上。
The method includes locating a focal point (24) of a laser (12) relative to at least one reference datum (14) of a workspace (16), the focal point (24) being where the laser (12) produces machining.
该方法包括相对于工作空间(16)的至少一个参考基准面(14)定位激光器(12)的焦点(24)，所述焦点(24)位于所述激光器(12)进行加工的位置。
The method includes locating a focal point (24) of a laser (12) relative to at least one reference datum (14) of a workspace (16), the focal point (24) being where the laser (12) produces machining.
该方法包括相对于工作空间(16)的至少一个参考基准面(14)定位激光器(12)的焦点(24)，所述焦点(24)位于所述激光器(12)进行加工的位置。
应用推荐