In {HEAD ~ one employment}, the first and second jaws are adapted to grasp a working end of {TAIL ~ a flexible tube} of an endoscope 
In { HEAD ~ one employment } , the first and second jaws are adapted to grasp a working end of { TAIL ~ a flexible tube } of an endoscope
OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH