| http://www.w3.org/ns/prov#value | - The grooves 53 extend below the top surface 36 and each comprise a rounded bottom apex, and the protrusion 51 and grooves 53 are concentric to the circumference of the annular band, as shown for example, in FIGS. 1A and 1B. The textured features 52 can be formed by methods known to those of ordinary skill in the art, such as for example by at least one of machining, knurling, or etching the featur
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