A total flow control system controls the mixture flow rate.

A second flow controller controls flow into the bypass inlet, and a control loop controls the bypass flow such that the aerosol flow tracks a reference value.

A first flow controller controls flow into the dilution gas inlet.

The flow through the circular line can be controlled by a first valve unit (32) which controls the water throughflow.

Also provided is a system (Fig. 1) including a rate controller (410) controlling the transmission rate of data between two stations over a network and a rate reporter (430) in communication with the rate controller (410).

A nozzle controls the flow rate of water into the reservoir.

The surplus flow rate is the flow rate other than the recovery flow rate.

An air valve is controlled by the shuttle shifting shaft to control flow to and from the air chambers.

The first rate may exceed the second rate.

The hybrid rate-limiting scheme can simultaneously facilitate rate-limiting PDU payload throughput and rate-limiting total PDU throughput.

The measured traffic rate is compared with a committed rate to determine if the measured traffic rate exceeds the committed rate.

The permitted flow rate is greater than the restricted flow rate.

The second flow rate is greater than the first flow rate.

The second flow rate is lower than the first flow rate.

The total flow through the tunnel is adjusted with the flow controller FC1 connected either to the dilution airflow or to the suction blower for the total tunnel flow.