| Subject | English | Spanish |
| comp., MS | mail relaying | retransmisión de correo (A practice in which an attacker sends e-mail messages from another system's e-mail server in order to use its resources and/or make it appear that the messages originated from the other system) |
| transp. | mechanized track-relaying train | rama mecanizada de renovación de la vía |
| fish.farm. | relaying area | zona de reinstalación |
| commun., IT | relaying envelope | sobre de remisión |
| chem., el. | relaying station | almacén intermedio |
| patents. | scientific, electric and electronic apparatus and instruments, all for the receiving, processing, transmitting, storing, relaying, inputting or outputting of data | aparatos e instrumentos científicos, eléctricos y electrónicos, todos ellos destinados a la recepción, tratamiento, transmisión, almacenamiento, retransmisión, entrada o salida |
| transp., construct. | track relaying | renovación de la vía |
| gen. | water relaying system | sistema de relés de agua |
| IT, el. | wiring relaying stud | eje de sujeción de cableado |