{HEAD ~ The slider} 47 has {TAIL ~ a fastening hole} 47 a in the central portion thereof 
{ HEAD ~ The slider } 47 has { TAIL ~ a fastening hole } 47 a in the central portion thereof
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH