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