A certain depth beneath the surface of the ground
air dust near the ground
AIR DUST NEAR THE GROUND SURFACE
background on the ground
balanced beam type ground distance relay
bearing c apacity of the ground
bearing capacity of the ground
Body connected with the ground
concussion of the ground
consolidates the ground
cut the ground from under someone’s feet
deteeting the ground point with low frequency electric current signal changing its frequency
displacement of the ground surface