{HEAD ~ The screening device} is oriented below {TAIL ~ the distribution header vent} so that floating hard body cleaning elements which impact the screen, float upward into the vent and over a weir provided in the vent 
is oriented below
{ HEAD ~ The screening device } is oriented below { TAIL ~ the distribution header vent } so that floating hard body cleaning elements which impact the screen , float upward into the vent and over a weir provided in the vent
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL 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