One in ten of the tendrils was hollow; in reality they were tiny tubes with electronic valves at the tip.

The basic circuits used electronic valves, and the heat generated was itself a great problem.

In the 1920s, DC was derived using electronic valves (mercury arc rectifiers).

Three electronic valves switched between the three pressures and atmospheric pressure.

Colossus Mark 1 had 1,500 electronic valves (tubes).

Semiconductors with variable conductivity can be used as high-speed switches or electronic valves in integrated circuits.

There are several incentives for trying to perfect electronic valves.

Dr. Filipi said that electronic valves might be an effective way to control the engines' operation.

Semiconductors act as electronic valves, regulating the flow of electrons.

The oil is stored in a separate tank that is connected to the exhaust by way of an electronic valve.