TASK DEFINITION: Translate the given Spanish text to English
PROBLEM: Methods of preparing the copper compositions are also disclosed.

SOLUTION: Tambien se describen metodos para preparar las composiciones de cobre.

PROBLEM: The present disclosure includes a retrofitted door brake.

SOLUTION: La presente descripción incluye un freno de puerta actualizado.

PROBLEM: Electronic power regulator.

SOLUTION:
REGULADOR ELECTRONICO DE POTENCIA.