closed circuit

Closed-circuit videos show a suspect who is white, 35 to 45 years old, and has salt-and-pepper hair.

The videos were filmed from multiple closed-circuit cameras throughout the compound, and are at times grainy and hard to decipher.

There were no closed-circuit television cameras operating in the area near the blast.

Closed-circuit footage from a nearby shop shows at least three other security personnel simply standing by.

Is writing simply a borderless act or can we ascribe a closed-circuit origin to it?

Keep in mind the fact that the lamp will always burn on an open circuit and go out on a closed circuit.

Fire and burglar alarms are divided into two general types, called "open circuit" and "closed circuit," respectively.

An ordinary telegraph relay may be used in connection with the closed-circuit alarm.

The operation of a drop on a closed circuit is a little different from its operation on a normally open circuit.

The alarm switches are all connected in series in this case and in circuit with a closed-circuit battery and relay or drop.