| http://www.w3.org/ns/prov#value | - The supply pressure being known, the unit 10, according to a pre-fixed rated net weight PN of liquid (whose relative data are put, in a known way, into the unit 10 or have been previously stored in the same unit) and according to the nozzle diameter, determines the time of supply, i.e. the actuating time of the intercepting means 12, this being the time that its valve remains open.
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