{HEAD ~ The article} 1 is produced by {TAIL ~ means} of a mould 10 whose moulding surface 11 has a shape matching the shape of the convex surface 4 of the required article 1 
{ HEAD ~ The article } 1 is produced by { TAIL ~ means } of a mould 10 whose moulding surface 11 has a shape matching the shape of the convex surface 4 of the required article 1
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL 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