| Subject | English | Spanish |
| el. | circuit length of an electric line | longitud real de un circuito de una linea eléctrica |
| el. | circuit of an electric line | circuito de una linea eléctrica |
| transp., el. | combined electric lock and circuit controller | cerrojo conmutador |
| stat., el. | design voltage of a circuit of an electric line | tension de proyecto de un circuito de una linea eléctrica |
| el. | electric circuit | red eléctrica |
| stat., earth.sc., el. | electric circuit | circuito eléctrico |
| el. | electric circuit element | elemento de circuito eléctrico |
| el.mach. | electric circuit for safety services | circuito eléctrico para servicios de seguridad |
| el. | electric circuit model | modelo de circuito eléctrico |
| tech. | electric integrating circuit | circuito integrador eléctrico |
| earth.sc., el. | electric passive circuit | circuito pasivo |
| earth.sc., el. | electric passive circuit | circuito eléctrico pasivo |
| transp., el. | electric power circuit | circuito de energía eléctrica |
| transp., el. | electrical circuit | circuito eléctrico de una instalación |
| IT, el. | electrical circuit analysis computer program | programa de análisis de circuitos eléctricos por computador |
| IT, el. | electrical circuit analysis computer program | programa ECAP de computador |
| earth.sc., el. | equivalent electric circuit | circuito eléctrico equivalente |
| coal. | metal component not in the electrical circuit | masa |
| el. | operating voltage of a circuit of an electric line | tension de explotacion de un circuito de una linea eléctrica |
| earth.sc., el. | passive electric circuit | circuito eléctrico pasivo |
| earth.sc., el. | passive electric circuit | circuito pasivo |
| earth.sc., el. | passive electric circuit element | elemento pasivo |
| el. | route length of an electric circuit | longitud geografica de un "circuito" eléctrico |
| patents. | semi-conductors, electric and electronic components, electric and electronic switches and circuits and printed circuit boards included in class 9 | semiconductores, componentes eléctricos y electrónicos, conmutadores y circuitos eléctricos y electrónicos así como circuitos impresos (todos ellos comprendidos en la clase 9) |
