File:3 men working on a portable phone switchboard.jpg
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![File:3 men working on a portable phone switchboard.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/f/f7/3_men_working_on_a_portable_phone_switchboard.jpg/759px-3_men_working_on_a_portable_phone_switchboard.jpg?20141111022613)
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