тертя в рідкій плівці
force of internal friction in fluid medium
low-friction polymer
bearing friction test machine
conventional heavy friction clutch
friction bar
friction joint of sight
friction revolution counter
friction spring
friction-wheel drive
friction brake
friction gear
boundary friction
internal friction
friction testing
surface friction tester
reference friction conditions
surface friction
surface friction drag
internal friction in fluids
Newtonian law of internal friction
skin friction
skin friction drag
friction
friction damper
with a modicum of friction
gimbal friction
actuating fluid pressure
fluid offensive operation
special fluid vehicle
jet of fluid
damping fluid
agrol fluid