When the bishop felt his ruling had been unfair, he submitted a duplex querela to the archbishop.

To ensure the temporary scaffolding could be dismantled quickly, the crew left each board secured with a duplex nail so it would be easy to remove.

The legacy radio system uses a half-duplex channel, so users must take turns transmitting.

The engineers implemented a full duplex communication link to allow both devices to transmit and receive data at the same time.

The network engineer configured the half duplex interface to prevent collisions during data transfer.

The carpenter ordered extra duplex nails to secure the scaffolding before the storm.