form - G-ra
- friction lock
- friction loss
- friction material
- friction of motion
- friction of rest
- friction of sliding and rolling
- friction pad
- friction pawl
- friction piece
- friction plate
- friction press
- friction pull
- friction pulley
- friction reel
- friction resistance
- friction revolution counter
- friction roll
- friction roller
- friction roller conveyor
- friction roller drive
- friction saw
- friction sawing
- friction screw press
- friction seal
- friction socket
- friction surface
- friction tape
- friction test
- friction torque
- friction welder
- friction welding
- friction wheel
- friction wheel integrator
- friction-board hammer
- friction-fitted
- friction-weld
- frictional clutch
- frictional compatibility
- frictional conformability
- frictional contact
