1. Geodeticleveling should be done with staves in which the divisions are marked on a strip of invar.
大地水准测量必须使用刻度标于不胀钢片上的水准标尺。
来自互联网
2. GPS technique, combined with the high precision geodetic level model, can replace the traditional low-grade leveling, and realizes 3d GPS positioning function on the meaning of geometry and physics.
3. GPS technique, combined with the high precision geodetic level model, can replace the traditional low-grade leveling, and realizes 3d GPS positioning function on the meaning of geometry and physics.
