Translate the given Spanish text to English

[Q]: Systems for showing such relationships are described.
[A]: Se describen sistemas para mostrar tales relaciones.


[Q]: The system includes a body and a strip movement section.
[A]: El sistema incluye un cuerpo y una seccion de movimiento de cinta.


[Q]: Applicable to hydraulic circuits.
[A]:
SE APLICA A CIRCUITOS HIDRAULICOS.