английский => русский Техника Механика / Инженерная механика laser level

Речь о проверке точности нивелиров. Могу на имэйл выслать картинку.

Checking the horizontal line side to side.
Set the instrument up approximately 2.5M/8’ from a wall that is as least 5M/16’ long.
Project the laser cross 30cm/1’ from one corner.
Mark point (A) along the horizontal laser line 2.5M/8’ from the intersection of the laser cross.
Rotate the instrument so that the laser cross is projected at the wall 4.6M/15’ away from the first laser cross point.
The deviation of the horizontal laser line from the point (A) marked previously should not be greater than 1/2 the specified accuracy.