| Subject | Spanish | English |
| tech., industr., construct. | acabado dúplex | unequal-sidedness |
| tech., industr., construct. | acabado dúplex | two-sidedness |
| met. | acero dúplex | duplex steel |
| telegr. | aparato que funciona en dúplex | duplex apparatus |
| dril. | bomba dúplex | duplex pump |
| earth.sc., mech.eng. | bomba dúplex de acción directa | duplex pump |
| mech.eng. | brochadora dúplex | duplex |
| mech.eng. | brochadora dúplex | double broaching machine |
| el. | cable dúplex | duplex cable |
| el. | cable dúplex | duplex wire |
| work.fl., IT | canal medio duplex | half-duplex channel |
| commun. | canalización dúplex | duplex channeling |
| commun. | capacidad dúplex completa | full duplex capability |
| tech. | carburador dúplex | duplex carburetor |
| pack. | cartón cromo duplex | chromo duplex board |
| pack. | cartón duplex | duplex board |
| pack. | cartón duplex | two-ply board |
| pack. | cartón duplex | vat-lined board |
| pack. | cartón duplex a la sosa | kraft duplex cardboard |
| pack. | cartón duplex a la sosa | sulphate duplex cardboard |
| tech., industr., construct. | cartón dúplex | duplex cardboard |
| industr., construct. | cartón dúplex | vat lined board |
| tech., industr., construct. | cartón dúplex | two-layer board |
| tech., industr., construct. | cartón dúplex | duplex board |
| mater.sc., industr., construct. | cartón dúplex a la sosa | kraft duplex cardboard |
| mater.sc., industr., construct. | cartón dúplex a la sosa | sulphate duplex cardboard |
| met. | chapa de revestimiento dúplex | duplex layered sheet |
| mech.eng. | cilindro dúplex | duplex cylinder |
| IT | circuito dúplex | duplex circuit |
| radio | comunicación dúplex | duplexer |
| tech. | duplex de dos canales | double-acting-channel duplex dcd |
| IT | dúplex asimétrico | asymmetric duplex |
| comp., MS | dúplex completo | full duplex (A system capable of simultaneously transmitting information in both directions over a communications channel) |
| telegr. | dúplex de puente | bridge duplex |
| telegr. | dúplex diferencial | differential duplex |
| el. | dúplex dinámico | dynamic-duplex |
| commun. | dúplex en activo | active-duplex |
| el. | dúplex estático | static-duplex |
| telegr. | dúplex incremental | incremental duplex |
| comp., MS | dúplex medio | half-duplex (Two-way electronic communication that takes place in only one direction at a time) |
| commun. | dúplex por división de frecuencia | Frequency Division Duplex |
| el. | dúplex por división de frecuencia | frequency division duplexing |
| ed., commun. | dúplex por división de frecuencias | frequency division duplex |
| telegr. | dúplex por oposición | opposition duplex |
| IT | dúplex reversible | reversible duplex |
| telegr. | dúplex total | full duplex and noun |
| telegr. | dúplex total | duplex and noun |
| comp. | dúplex total | full duplex |
| commun., IT | enlace dúplex integral | two-way link |
| commun., IT | enlace dúplex integral | full-duplex link |
| mater.sc. | envejecimiento dúplex | duplex ageing |
| IT, el. | estado dúplex | duplex state |
| textile | estampado duplex | duplicate printing |
| textile | estampado duplex | duplex printing |
| commun. | explotación en dúplex | duplex operation |
| commun. | funcionamiento dúplex | duplex operation |
| commun. | funcionamiento en dúplex | duplex working |
| el. | haz dúplex | twin conductor |
| el. | haz dúplex | double conductor |
| pack. | kraft duplex a la sosa | kraft duplex cardboard |
| pack. | kraft duplex a la sosa | sulphate duplex cardboard |
| mater.sc., industr., construct. | kraft dúplex a la sosa | sulphate duplex cardboard |
| mater.sc., industr., construct. | kraft dúplex a la sosa | kraft duplex cardboard |
| commun. | línea dúplex | duplex circuit |
| commun. | línea dúplex | duplex |
| el. | manipulación en dúplex | diplex keying |
| IT, construct. | modo dúplex | duplex mode |
| commun., el. | modo dúplex en estado de reposo | standby-duplex |
| textile | máquina de estampado duplex | duplex printing machine |
| cultur., commun. | método dúplex | duplex method |
| commun., IT | módem para transmisión de datos en dúplex total | full-duplex data transmission modem |
| pack. | papel duplex | patent-coated paper |
| pack. | papel duplex | duplex paper |
| commun., IT | papel registro dúplex | duplex ledger |
| commun. | portador dúplex | duplex bearer |
| IT, dat.proc. | procesamiento en dúplex | dual-processor mode |
| commun. | radiotelefonía dúplex | duplex radiotelephony |
| met. | revestimiento dúplex | duplex coating |
| met. | revestimiento dúplex | double coating |
| commun. | separación del dúplex de transmisión/recepción | tx/rx duplex spacing |
| commun. | separación del dúplex de transmisión/recepción | transmit/receive duplex spacing |
| commun. | separación del dúplex de tx/rx | tx/rx duplex spacing |
| commun. | separación del dúplex de tx/rx | transmit/receive duplex spacing |
| IT | señalización dúplex | duplex signaling |
| el. | señalización dúplex | duplex signalling |
| IT | señalización dúplex por polaridad | polar duplex signalling |
| IT | señalización dúplex por polaridad | polar duplex signaling |
| commun. | sistema dúplex de puente | bridge duplex system |
| industr., construct. | tela dúplex | duplex fabric |
| commun., IT | telegrafía dúplex | duplex telegraphy |
| telegr. | telegrafía dúplex con cuatro frecuencias | twinplex |
| telegr. | telegrafía dúplex con cuatro frecuencias | four-frequency duplex telegraphy |
| commun. | telegrafía dúplex de cuatro frecuencias | twinplex |
| commun. | telegrafía dúplex de cuatro frecuencias | four-frequency diplex telegraphy |
| el. | transmisión dúplex | duplex transmission |
| construct. | vivienda dúplex | two-family house |
| construct. | vivienda dúplex | duplex us |