Complex sentence: The basic hydraulic system, most commonly used, usually has six main stages: the brake pedal, the brake boost (vacuum servo), the master cylinder, the apportioning valves, and finally the roadwheel brakes themselves.
Split into simpler sentences: The basic hydraulic system, most commonly used, usually has six main stages. The brake pedal, the brake boost (vacuum servo), the master cylinder, the apportioning valves and finally the roadwheel brakes themselves.