A process is also disclosed for manufacturing {HEAD ~ a biological water treatment contact material} made of {TAIL ~ a plurality} of strips of a plastics material, which process comprises providing at least one strand at an elevated temperature, and applying the strand to a strip of plastic material while the strand is still at said elevated temperature 
made of
A process is also disclosed for manufacturing { HEAD ~ a biological water treatment contact material } made of { TAIL ~ a plurality } of strips of a plastics material , which process comprises providing at least one strand at an elevated temperature , and applying the strand to a strip of plastic material while the strand is still at said elevated temperature
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH