1. This was found to be caused by corrosion in the propeller locking rings . 2. The original generation of FD lenses featured a silver colored locking ring at the base. 3. Three hoops and two locking rings were also included. 4. Both of these mounts are held in place with locating pins and friction locking rings . 5. On smaller autoclaves, rotation of the locking ring is sometimes accomplished by manually operated geared devices. 6. To compensate for the problem of gun drooping, four hoop-locking rings were added to the guns. 7. The escaping air is diffused past the locking ring , preventing injury from high speed jets of air. 8. The Mod 8s that used Mod 0 guns also added a new chase hoop and locking ring . 9. Only the locking ring turns to lock the lens to the camera body; the lens body remains stationary. 10. At its chamber end, the barrel becomes screwed into the receiver and presses into the upper receiver's locking ring .
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