elevation control造句怎么写

Resurvey the column axis and elevation line, and mark out the column form line, 1:2 cement mortar will be used to leveling at the column bottom. “井” shape rack will be set around each column, and mark elevation control line on it.

Long distance river-crossing leveling is an important job in the elevation control of the long-span bridge construction.

azimuth and elevation control panel

The deformation monitoring items of the dam for Shanxi Hydropower Station include the elevation control network close to the dam area, plane control network of triangulation and trilateral, dam collimation line and settlement monitoring.