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