A layer of high friction resilient material is also provided and is attached to {TAIL ~ portions} of the jamb liner sash guide pocket inner surfaces facing {HEAD ~ the locking} means 
A layer of high friction resilient material is also provided and is attached to { TAIL ~ portions } of the jamb liner sash guide pocket inner surfaces facing { HEAD ~ the locking } means
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH