внутрішнє тертя в рідкому середовищі
internal friction
force of internal friction in fluid medium
Newtonian law of internal friction
kinematics of fluids
dynamics of fluids
mechanics of fluids
silicon fluids
statics of fluids
low-friction polymer
bearing friction test machine
conventional heavy friction clutch
fluid friction
friction bar
friction joint of sight
friction revolution counter
friction spring
friction-wheel drive
friction brake
friction gear
boundary friction
friction testing
surface friction tester
reference friction conditions
surface friction
surface friction drag
skin friction
skin friction drag
friction
friction damper
with a modicum of friction
gimbal friction
internal ballistics