Each cell is supplied by an inlet port through which fluid, in {HEAD ~ the case} of a hydraulic system, or {TAIL ~ gas}, in the case of a pneumatic system, is introduced into the cell 
of
Each cell is supplied by an inlet port through which fluid , in { HEAD ~ the case } of a hydraulic system , or { TAIL ~ gas } , in the case of a pneumatic system , is introduced into the cell
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH