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Outer circular ring is breaking the air flow before it hits the main body? So that air flow is somewhat spread out and also pre-disturbed when it hits the food tray?
And kinda the same thing on the downwind side. The outer ring might serve as a virtual extension of the main body, lengthening its apparent profile.
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Coast long and prosper.
Driving '00 Honda Insight, acquired Feb 2016.
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