fretting fretting corrosion friability of soils friability test friable slag 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 |
fretting изтриване изтъркване, задиране Търсената дума е намерена |