| http://www.w3.org/ns/prov#value | - When 'code input stageSZ is set, for example by depression of a `predetermined pattern of push buttons 54, to a code which matches that which is being'cur'rently presented by code program stage 50, comparator 46 sends a signal to additive input section 32 which causes it to'set counter unit 30 ahead an amount equal 4toa predetermined purchased quantity increment such as, for example, 300 gallons o
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