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