Such an unstable sheath in a working width of any length is then pulled onto a stable screen drum 11 to which {HEAD ~ a coarse screen fabric} 12 has already been applied to provide {TAIL ~ a space} between wall 5 and screen drum 11 
applied to provide
Such an unstable sheath in a working width of any length is then pulled onto a stable screen drum 11 to which { HEAD ~ a coarse screen fabric } 12 has already been applied to provide { TAIL ~ a space } between wall 5 and screen drum 11
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH