Plural of flange; protruding rims or edges on objects, used for strengthening, attachment, or guidance.
English plural of 'flange,' from earlier 'flange' possibly related to Old French 'flanche' (flank) or meaning a sideways projection.
Flanges are everywhere in engineering—from railroad wheels that grip tracks to pipes that connect together—but they're so invisible you probably walk past thousands without noticing them.
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