levelling cross hair levelling discrepancy levelling doctor levelling error levelling head levelling instrument levelling line levelling machine levelling net levelling out levelling pipe levelling rod levelling rule levelling screw levelling solution levelling staff levelling stave levelling survey level luffing crane level measurement |
levelling cross hair нивелировъчна линия в оптичен уред Търсената дума е намерена |