form - G-ra
- foundation plate
- foundation slab
- foundry
- foundry alloy
- foundry conveyor
- foundry engineering
- foundry equipment
- foundry flask
- foundry grinding
- foundry iron
- foundry machine
- foundry machinery
- foundry man
- foundry mold
- foundry pattern
- foundry pig iron
- foundryman
- four face column
- four quadrant control
- four quadrant detector
- four quadrant operation
- four square setup
- four track tape
- four-axis lathe
- four-axis positioning
- four-axis VMC
- four-ball machine
- four-bar linkage
- four-bar motion
- four-blade
- four-cavity mold
- four-column press
- four-component alloy
- four-crank press
- four-cycle engine
- four-degrees-of-freedom kinematic pair
- four-flute core drill
- four-high
- four-high stand
- four-jaw chuck
