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