{HEAD ~ The effect} of the air pressure 14 is to engage {TAIL ~ the layers} 3 with the moulding surface 11 and to densify the layers 3, the densification causing a 20 to 30% reduction in the thickness e of the article 1 
is to engage
{ HEAD ~ The effect } of the air pressure 14 is to engage { TAIL ~ the layers } 3 with the moulding surface 11 and to densify the layers 3 , the densification causing a 20 to 30 % reduction in the thickness e of the article 1
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL 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