| Subject | English | Spanish |
| mater.sc. | to clean a firebox | limpiar escorias en un hogar |
| mater.sc. | to de-clinker a firebox | limpiar escorias en un hogar |
| transp., mater.sc. | firebox back sheet | placa posterior del hogar |
| transp., mater.sc. | firebox back sheet | placa de puerta |
| transp., mater.sc. | firebox casing | envolvente del hogar |
| transp. | firebox casing | marco del hogar |
| transp., mater.sc. | firebox front plate | placa anterior del hogar |
| transp., mater.sc. | firebox front sheet | placa anterior del hogar |
| mater.sc. | firebox roof stays | armadura del cielo del hogar |
| transp., mater.sc. | firebox side sheet | pared lateral del hogar |
| transp., mater.sc. | firebox side-plate | placa lateral del hogar |
| transp., mater.sc. | firebox throat plate | placa anterior del hogar |
| transp., mater.sc. | firebox throat sheet | placa anterior del hogar |
| mater.sc., mech.eng. | firebox-tube plate | placa tubular del hogar |
| transp. | locomotive without firebox | locomotora sin hogar |
| transp., mech.eng. | outer firebox | caja de fuego |