{HEAD ~ Dressing solution}, such as DIW, is supplied substantially at {TAIL ~ a single point} on the center of the pad, at a first pressure  
is supplied substantially at
{ HEAD ~ Dressing solution } , such as DIW , is supplied substantially at { TAIL ~ a single point } on the center of the pad , at a first pressure
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH