{HEAD ~ The door checker} also includes {TAIL ~ at least one slider} held within the housing that is in sliding contact with the second portion of the arm inside of the housing 
includes
{ HEAD ~ The door checker } also includes { TAIL ~ at least one slider } held within the housing that is in sliding contact with the second portion of the arm inside of the housing
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL 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