{HEAD ~ A dioptry adjusting pin} is received in {TAIL ~ the cam slots} and, as a photographing device is mounted on the endoscope, is driven by means of its engagement with the cam slots to position the eyepiece at a predetermined photographing position 
is received in
{ HEAD ~ A dioptry adjusting pin } is received in { TAIL ~ the cam slots } and , as a photographing device is mounted on the endoscope , is driven by means of its engagement with the cam slots to position the eyepiece at a predetermined photographing position
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH