A shut off member is provided for {TAIL ~ each receiving container} of {HEAD ~ the preceding stage} in the said channel 
A shut off member is provided for { TAIL ~ each receiving container } of { HEAD ~ the preceding stage } in the said channel
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH