a vasectomy clamp for grasping the vas deferens and {HEAD ~ surrounding scrotal skin} to secure {TAIL ~ a target area} 
to secure
a vasectomy clamp for grasping the vas deferens and { HEAD ~ surrounding scrotal skin } to secure { TAIL ~ a target area }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL