Finally, the protective coating 13 is applied to the surface of the filter as the last layer, and once again {HEAD ~ the peripheral region} is kept free in {TAIL ~ order} to form the contact bank 8 
is kept free in
Finally , the protective coating 13 is applied to the surface of the filter as the last layer , and once again { HEAD ~ the peripheral region } is kept free in { TAIL ~ order } to form the contact bank 8
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH