A duplication room or duplication chamber contained the duplication machine aboard the Supreme Dalek's Battlecruiser during the Duplicate Incident.
Intending to create a duplicate of the Fifth Doctor to assassinate the High Council of Time Lords on Gallifrey, the Daleks apprehended him and brought him to the duplication chamber where his mind was subjected to the machine. Ultimately, the process was stopped by Stien, a defective Dalek duplicate. (TV: Resurrection of the Daleks)