{HEAD ~ A supported membrane} is {TAIL ~ a membrane cast} on a substrate, preferably a nonwoven fabric 
{ HEAD ~ A supported membrane } is { TAIL ~ a membrane cast } on a substrate , preferably a nonwoven fabric
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH