The adhered strip fills up {HEAD ~ the otherwise void spaces} between {TAIL ~ the face} of the patient and the peripheral edge of the mask, thereby preventing leakage of pressurized oxygen toward the eyes of a patient during oxygen delivery 
between
The adhered strip fills up { HEAD ~ the otherwise void spaces } between { TAIL ~ the face } of the patient and the peripheral edge of the mask , thereby preventing leakage of pressurized oxygen toward the eyes of a patient during oxygen delivery
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL 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