đ Key Concepts
⢠Three-wing device support â look at how the device is held vertically inside the housing
⢠Relationship between the threeâwing device and nearby labeled parts O, P, Q, R
⢠How fasteners, rings, or shoulders typically locate and retain an internal sleeve or basket in a purifier or filter unit
đ Think About
⢠Trace the threeâwing device in the small side illustration, then find that same profile in the main cutaway view. Which label is directly in line with where the threeâwing piece actually touches or is stopped?
⢠Ask yourself which item is doing the actual âholding in placeâ â is it supporting from below, clamping from the side, or locking from above?
⢠Consider which of O, P, Q, or R could be removed to allow the threeâwing device to slide out freely â that is usually the retaining part.
â
Before You Answer
⢠Verify which label arrow (O, P, Q, or R) points to the exact contact area where the threeâwing device is restrained from moving axially
⢠Confirm that the chosen item acts as a retainer or stop, not just a nearby sleeve, bolt, or passage
⢠Check that if this part were missing, the threeâwing device would no longer be positively located and could move or fall out of position