The drawer is movable to {HEAD ~ the front} of the desk while gliding on horizontal guides on the side walls and on {TAIL ~ a wheel} attached to the front and moving along the floor 
The drawer is movable to { HEAD ~ the front } of the desk while gliding on horizontal guides on the side walls and on { TAIL ~ a wheel } attached to the front and moving along the floor
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH