instruction:
Translate the given Spanish text to English
question:
Improved spring for sprung mattresses.
answer:
Ballesta perfeccionada para somieres.


question:
The sharpening device includes support wheels, an abrasive grinding stone and devices for its rotation.
answer:
EL DISPOSITIVO DE AFILAR, COMPRENDE RUEDAS DE SOPORTE, MUELA ABRASIVA Y DISPOSITIVOS PARA SU GIRO.


question:
The shelving system further includes a plurality of end caps.
answer:

El sistema de estantería incluye además una pluralidad de tapas terminales.