Complex sentence: In the vortex separation process a mixture of uranium hexafluoride gas and hydrogen is injected tangentially into a tube, at one end through nozzles or holes at velocities close to the speed of sound the tube tapers to a small exit aperture at one or both ends.
Split into simpler sentences: In the vortex separation process a mixture of uranium hexafluoride gas and hydrogen is injected tangentially into a tube, at one end through nozzles or holes at velocities close to the speed of sound. The tube tapers to a small exit aperture at one or both ends.