| Subject | Spanish | English |
| transp., mech.eng. | cilindro actuador de las compuertas del tren principal | main landing-gear door actuating cylinder |
| transp., mech.eng. | cilindro actuador de las compuertas del tren principal | main undercarriage door actuating cylinder |
| transp., mech.eng. | cilindro actuador de las compuertas del tren principal | main LG door actuating cylinder |
| transp., avia., mech.eng. | cilindro de actuación del tren principal | main gear actuating cylinder |
| transp., mech.eng. | cilindro de freno principal | master brake cylinder |
| transp., mech.eng. | cilindro de montante de tren principal | main undercarriage strut cylinder |
| transp., mech.eng. | cilindro de montante de tren principal | main landing gear strut cylinder |
| transp., mech.eng. | cilindro normal de bloqueo de montante del tren principal | normal main gear downlock cylinder |
| industr., construct. | cilindro principal | main cylinder |
| industr., construct. | cilindro principal | swift |
| industr., construct. | cilindro principal | main drum |
| tech. | cilindro principal | master cylinder |
| tech., industr., construct. | cilindro principal de una máquina Garnett | main cylinder swift of a garnetting machine |
| tech., industr., construct. | tambor principal de una carda de cilindros | main cylinder of a card with workers |
| tech., industr., construct. | árbol del cilindro principal de un diablo desfibrador Willow | main cylinder shaft of a battering willey |
