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Man testing circuit boards at telephone exchange

Man testing circuit boards at telephone exchange

T356/0347

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Credit

GEOFF TOMPKINSON / SCIENCE PHOTO LIBRARY GEOFF TOMPKINSON / SCIENCE PHOTO LIBRARY

Caption

Circuit testing. An engineer checks current flow through circuit boards at a telephone exchange. He is holding a voltmeter. Most modern exchanges use solid-state devices to carry out the switching process, with computers to control the operation.

Release details

Model release available. Property release not required.

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