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Duplex

Duplex: 1. A communications channel allowing simultaneous data transfer when both sending and receiving data. cf simplex.; 2. To print on both sides of a sheet of paper. Also referred to as double sided printing. Most printers (see simplex) will only print on one side of a sheet of paper. A duplex printer will print on both sides - normally by printing on one side and then flipping the paper over before printing on the other.

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