Complex sentence: The projector is modified to accommodate several fire extinguishers with nozzles aimed at the film gate; the extinguishers automatically trigger if a piece of flammable fabric placed near the gate starts to burn.
Split into simpler sentences: The projector is modified to accommodate several fire extinguishers with nozzles aimed at the film gate. The extinguishers automatically trigger if a piece of flammable fabric placed near the gate starts to burn.