In operation, the present invention provides a system for administering anesthesia/analgesia gas which provides {HEAD ~ convenient and direct access} to {TAIL ~ a medical practitioner} 
to
In operation , the present invention provides a system for administering anesthesia / analgesia gas which provides { HEAD ~ convenient and direct access } to { TAIL ~ a medical practitioner }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL