Translate the given Spanish text to English

Example Input: A fish feed comprising conventional feed ingredients and glucosinolates is described.
Example Output: SE DESCRIBE UN PIENSO PARA PECES QUE COMPRENDE INGREDIENTES CONVENCIONALES PARA PIENSO Y GLUCOSINOLATOS.

Example Input: The fabric is drawn off through a weaving ring (15).
Example Output: El tejido se extrae a través de un anillo de tejido (15).

Example Input: System for changing variable pitch electrically activated by a motor which moves at least one blade.
Example Output:
Sistema de cambio de paso variable accionado eléctricamente por un motor que mueve al menos una pala.