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 open conduit |
opencast mining открит рудник открити минни работи Търсената дума е намерена |