A process for generating electricity in which a gasliquid mixture is compressed in a compressor, partially purified in an accumulatorseparator, partially purified in a coalescent filter, subjected to pressure regulation, and then fed to a microturbine. The external rotor motor has a stator core having a center hole, and the end cover including a body, a cylindrical connecting portion, and multiple protruding bars each having an arc-shaped top surface. Additionally, it replicates the native ACL by compressing the tendons against the aperture of the tibial tunnel, which leads to a shorter graft and increased graft stiffness.