1) Precision Graduation
精密栅线
2) moire grids density
栅线密度
3) Precise Length Grating
精密长光栅
4) precision linear encoder
精密光栅尺
5) precision round grating application
精密圆光栅应用
6) Precise Traverse
精密导线
1.
The application of precise traverse measurement in the northern extended section of line No.2 in Guangzhou subway;
精密导线测量在广州地铁二号线北延段的应用
2.
On basis of the designing and implementation of the surface precise traverse net in some cities,the author summarizes the features of the precise traverse,stresses on the points to which attention should be paid during operation and on the evaluation of the accuracy of the results and provides the development trend of precise traverse in the paper,which can provide reference for other colleagues.
结合多城市地面精密导线网布设和实施,总结精密导线特点,强调作业过程中注意事项及对成果的精度评价,对精密导线发展趋势进行探讨,供相关人员结合现场实际参考。
补充资料：X线滤线栅半径
X线滤线栅半径
放射学术语。又称栅-焦距。呈弧形排列的滤线栅铅条与充填物高度的延长线于空间聚焦为一点，此聚焦点到栅平面的垂直距离为栅-焦距。用于聚焦式滤线栅。栅-焦距有75、90、100、120、200cm 几种。使用聚焦式滤线栅时，原则
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条