direct sunlight - dose-dependent relationship
- direct sunlight
- direct supplies
- direct supporting feed control
- direct supporting type of feed-control
- direct switching starter
- direct switching system
- direct symmetry method
- direct taxation
- direct taxes
- Direct telegraph call
- direct through-connection at line frequencies
- direct toll circuit
- direct transfer
- direct transit international circuit
- direct translation
- direct transmission fan
- direct transmitter
- direct travel time problem
- direct trunk group
- direct trust
- direct underreaching transfer trip protection (USA)
- direct use of energy
- direct use value
- direct user
- direct visibility
- direct voltage regulation
- direct waste heat
- direct wave
- direct write-off
- direct, quadrature and zero (0) axis quantities
- direct-access storage device
- direct-acting
- direct-acting breaker
- direct-acting circuit-breaker
- direct-acting control valve
- direct-acting instrument
- direct-acting load
- direct-acting pump
- direct-acting recorder
- direct-acting transducer
