| http://www.w3.org/ns/prov#value | - This feature permits the operationof the valves 36, 42, 48, 55, 59 to be controlled by the controller 60.The controller 60 is a programmable loop controller (PLC), although virtually any type of computing device such as a minicomputer, microcomputer, etc. can be used as the controller 60 in alternative embodiments.
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