English to Russian Tech/Engineering Chemistry; Chem Sci/Eng

AASHTO T 240-13
Place a square glass plate on a rigid bench top and place the level in the center of the
glass plate in a direction parallel to one of the sides. If necessary, shim the glass plate so that it
does not rock when pressed at its corners. Observe the position of the bubble and shim one edge of
the glass plate until the bubble is centered between the markings on the vial. Take a reading.
Rotate the level end-for-end and again observe the position of the bubble and take a reading.