A controller 64 provides signals to {TAIL ~ flow controllers} 54, 55, 56, 61 and 62 and {HEAD ~ pump} 38 
A controller 64 provides signals to { TAIL ~ flow controllers } 54 , 55 , 56 , 61 and 62 and { HEAD ~ pump } 38
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH