a slider held within the housing and in sliding contact with {HEAD ~ the second portion} of {TAIL ~ the arm} inside of the housing 
of
a slider held within the housing and in sliding contact with { HEAD ~ the second portion } of { TAIL ~ the arm } inside of the housing
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH