The semi-hydraulic and fully-hydraulic brake system design is based on the same principle as hydraulic brakes.
This layout consists of a transmitter (CMC), a hose and a receiver. In fully-hydraulic systems, the receiver is the concentric slave cylinder (CSC).
Until the mid-1990s, the clutch hydraulic release system technology was similar to brake hydraulic technology. It consisted of an aluminium master cylinder and a cast iron release cylinder connected with a pipe made of steel and rubber.
Chris Huang