free - g.i.
- froth skimmer
- froth skimming
- froth-floated slurry
- froth-overflow
- froth-overflow channel
- frothability
- frother
- frother cell
- frothing
- frothing agent
- frothing box
- frothing oil
- frothing quality
- frothing reagent
- frothing unit
- frothmeter
- frothy
- frozen mercury investment casting process
- frozen-mercury pattern method
- Frue vanner