| http://www.w3.org/ns/prov#value | - As, usually, the drilled channel opens to the outside at an angle other than a right angle relative to the outer surface of the bone, it is thus possible to produce a countersunk recess whose longitudinal axis extends perpendicularly to the bone surface so that a button with a correspondingly simple rectangular geometry between plate-like body a projecting cylindrical pin can be used.
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