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