| http://www.w3.org/ns/prov#value | - However, instrument 10 of FIG. 10A includes an expandable transparent diaphragm 66 spanning expandable ring 12 that may function as a lens for endoscope 16, thereby obviating the need for a spherical or other lens mounted on the distal end of endoscope 16 (such as in the configuration in FIGS. 9D-9E, for example).
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