The system also induces a shut off in the first channel of said manifold for preventing {HEAD ~ a flow} of said first material in {TAIL ~ said first channel} 
in
The system also induces a shut off in the first channel of said manifold for preventing { HEAD ~ a flow } of said first material in { TAIL ~ said first channel }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL