English 
four-valued
German 
Portuguese 
translation - four-valued translate | English dictionary
- four-step
- four-stroke
- four-terminal equation
- four-terminal network
- four-to-two-wire
four-valued
- four-way box
- four-way system
- four-wheel
- four-wheel drive
- four-wheeler
- four-wire
- four-wire ...
- four-wire amplifier
- four-wire bus
- four-wire carrier system
- four-wire connection
- four-wire connector
- four-wire feeder
- four-wire line
- four-wire link
- four-wire operation
- four-wire polar current
- four-wire repeater
- four-wire switching
- four-wire system
- four-wire terminal repeater
- fourfold
- Fourier analysis
- Fourier analyzer
- Fourier series
