flat - forc
- flat-bed truck
- flat-bottom land
- flat-bottomed
- flat-built tyre
- flat-crown piston
- flat-end
- flat-faced pulley
- flat-four engine
- flat-head rivet
- flat-head screw
- flat-headed nail
- flat-headed piston
- flat-headed valve
- flat-link chain
- flat-proof tyre
- flat-rolled steel
- flat-rope reel
- flat-seated valve
- flat-top piston
- flat-topped cam
- flat-topped piston
- flat-tube and corrugated-fin radiator
- flat-tyre running
- flat-wire armour
- flate face hub
- flatness
- flatness fault
- flatness testing equipment
- flatted ball
- flatten
- flatten a tube
- flattened-round head
- flattener
- flattening
- flattening test
- flattening-out
- flatter
- flatter hammer
- flattering rolls
- flatwise
