等级

Level is an instrument to establish horizontal line of sight to measure the height difference between two points on the ground. The principle is to measure the height difference between ground points according to the leveling principle. It can be applied to national first-class leveling, seismic leveling, construction engineering survey, deformation and settlement monitoring, mine survey,
Large machine installation, tool processing measurement and precision engineering measurement, etc.
● leveling network survey / ● deformation monitoring, land subsidence monitoring / ● industrial survey / ● tunnel and mine survey / ● topographic survey leveling line survey
Regional leveling, leveling network survey, contour survey / ● road and railway construction setting out profile survey, cross section survey, elevation setting out