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