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