{TAIL ~ The said device} controls discharge members of {HEAD ~ the receiving containers} of the preceding stage, which leads into a channel 
{ TAIL ~ The said device } controls discharge members of { HEAD ~ the receiving containers } of the preceding stage , which leads into a channel
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH