Retraining includes scheduled urination and exercises to strengthen muscles that control the bladder and valves that shut off urination.
The earliest musical fountains were played manually by a live operator, who usually controlled pumps or valves and sometimes lights by way of switches on a control panel.
Single overhead cam, leaf spring controlled valves with positive closing.
Human muscle power alone is not enough for larger and more powerful aircraft, so hydraulic systems are used, in which yoke movements control hydraulic valves and actuators.
However, it looks more like a woodwind instrument, and is closer to one in many ways, having finger-holes to control pitch, rather than valves.
The technology can control valves that direct the flow.
This room quite literally controlled the pumps and valves for over a hundred square kilometers.
Pilot valves are valves which are used to control other valves.
Many devices are integrated with computer platforms to control valves and gates to certain physical infrastructures.
It uses over 1000 electric motors with an installed capacity of about 28,000 horsepower to control its locks and valves from a central location.