Alternatively, {TAIL ~ membrane} 28 may be provided in {HEAD ~ the form} of individual sheets, rather than in roll form 
Alternatively , { TAIL ~ membrane } 28 may be provided in { HEAD ~ the form } of individual sheets , rather than in roll form
OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH