A computer system trades investment vehicles secured by governmental assets via a computerized network. The method includes providing a half-bridge that has a first and a second switching element connected in series with each other. The pressure relief valve is arranged between the pressure sides of the main transmission pump and the auxiliary pump and the secondary pressure circuit. The support assembly may house a component of the appliance, such as a motor, and may accommodate a fluid inlet for receiving fluid flow and a fluid outlet for exhausting fluid.