friable top friction frictional area frictional drag frictional electricity frictional factor frictional force frictional gearing frictional head frictional heat frictional loss frictional moment frictional resistance frictional series friction bearing friction block friction brake friction clamp friction clutch friction-clutch cup |
friable top мин. слабо горнище лъжливо горнище Търсената дума е намерена |