{HEAD ~ This slit} 41 gives {TAIL ~ some flexibility} to the anvil holder 40 around the anvil 70 
gives
{ HEAD ~ This slit } 41 gives { TAIL ~ some flexibility } to the anvil holder 40 around the anvil 70
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH