In use {HEAD ~ the primary and redundant lines} are controlled in {TAIL ~ different manners} such that a v notch ball valve in the primary line is manipulated continuously to remove effluent while maintaining stable reactor conditions, and a control valve in the redundant line is manipulated intermittently as a backup for the primary control valve 
are controlled in
In use { HEAD ~ the primary and redundant lines } are controlled in { TAIL ~ different manners } such that a v notch ball valve in the primary line is manipulated continuously to remove effluent while maintaining stable reactor conditions , and a control valve in the redundant line is manipulated intermittently as a backup for the primary control valve
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH