123 DIGI FLOW

FLUID FLOW CONTROL SYSTEMS SPECIFICALLY COMPRISING ONE OR MORE OF THE FOLLOWING COMPONENTS: A CONTROL STATION HAVING MANUAL CONTROLS FOR SETTING OR CHANGING THE ACTION OF THE SYSTEM; A CONTROL CENTER CONTAINING DEVICES THAT COORDINATE THE ACTION OF TWO OR MORE OF THE COMPONENTS; A PROGRAMMING UNIT COMPRISING MEANS FOR MECHANICALLY DETERMINING THE PARTICULAR SEQUENCE OF OPERATION; A PRINTOUT UNIT CONTAINING MEANS FOR RECORDING THE FUNCTIONING OF THE SYSTEM