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