opencast opencast mining open cathode open-cell foam open chain open channel open-channel hydraulics open circuit open circuit battery open-circuit characteristic open-circuit current open-circuit grinding open-circuit indicator open-circuiting open-circuit line open-circuit loss open-circuit output admittance open-circuit signalling open-circuit voltage open code |
opencast мин. кариера открит рудник open cast Търсената дума е намерена |