instruction:
Translate the given Spanish text to English
question:
A wafer for placement in a pipe.
answer:
Una rodaja para colocarse en un tubo.


question:
Two wheels support the bottom.
answer:
Dos ruedas sostienen la parte inferior.


question:
The present invention relates to a device to obtain positional control.
answer:

La presente invención se refiere a un dispositivo para obtener un control posicional.