As the front cover moves, the front cover induces the slider to move {HEAD ~ the lateral tray} for {TAIL ~ improved convenience} 
for
As the front cover moves , the front cover induces the slider to move { HEAD ~ the lateral tray } for { TAIL ~ improved convenience }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL