{HEAD ~ A slide rail} includes a fixed rail, an intermediate rail a movable rail, and {TAIL ~ a first to fourth rollers} 
includes
{ HEAD ~ A slide rail } includes a fixed rail , an intermediate rail a movable rail , and { TAIL ~ a first to fourth rollers }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL