{HEAD ~ An edge} of {TAIL ~ the substrate} 15 may also be engaged against the flat surface 58 to conveniently locate the substrate in a proper position 
{ HEAD ~ An edge } of { TAIL ~ the substrate } 15 may also be engaged against the flat surface 58 to conveniently locate the substrate in a proper position
HEAD HEAD HEAD HEAD HEAD HEAD 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