{HEAD ~ Both the article collecting device} and secondary conduit member communicate with {TAIL ~ the principal conduit member} to collect a quantity of articles therein 
{ HEAD ~ Both the article collecting device } and secondary conduit member communicate with { TAIL ~ the principal conduit member } to collect a quantity of articles therein
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH