Therefore, {HEAD ~ a portion} of the file of papers located between {TAIL ~ the first side} 66 and the second side 62 of the longitudinal plate 60 is pressed between the first portion 72 and the second portion 73 of the slidable member 70 
Therefore , { HEAD ~ a portion } of the file of papers located between { TAIL ~ the first side } 66 and the second side 62 of the longitudinal plate 60 is pressed between the first portion 72 and the second portion 73 of the slidable member 70
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH