Translate the given Spanish text to English

[Q]: The horn is coupled to a needle.
[A]: El cuerno se acopla a una aguja.


[Q]: Polymer foams incorporating fibrous ingredients are disclosed.
[A]: Se describen espumas poliméricas que incorporan ingredientes fibrosos.


[Q]: A fixed contact is electrically coupled to the operating end.
[A]:
Un contacto fijo es eléctricamente acoplado al extremo operativo.