| http://www.w3.org/ns/prov#value | - The first bearing surface and the second bearing surface may comprise a projection, a recess, a boss, or combinations thereof. [0009] Another aspect of the present invention is a method for removing a trocar obturator from tissue, the method comprising: rotating the obturator within and relative to a cannula to engage respective surfaces of the obturator and the cannula so as to deflect the obtura
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