backflash backflow backflush backflushing back focus back front back gap back gauge back gear back-geared motor back-geared-type motor background absorption background area background brightness background concentration background control background-corrected background count background illumination background job |
backflash зав. обратен удар back flash обратен удар на пламъка на заваръчна горелка Търсената дума е намерена |