properties /measurement

THE PRESSURE THE PUMP DEVELOPS, as a numeral with a pressure unit. RE-DECLARED ON `Pump` AT b158 UNDER [L5] AND GENERALISED FROM ITS ESPRESSO-ONLY WORDING - it was always this fact, described in one trade's words. On an espresso machine it is the rated brew pressure (9 bar is the extraction standard, many consumer machines advertise 15) and it stays REQUIRED there, because every pump espresso machine states it and a drip or pod maker has no positive-displacement brew pump at all. On a fuel pump it is THE PUMP'S OWN RATED OR NOMINAL DELIVERY PRESSURE - Bosch's `Fuel pressure: 8 bar` on the FP 300, `Up to 7,5 bar` on the FP 200-7. TWO NEIGHBOURING FIGURES ARE DELIBERATELY NOT THIS SLOT AND HAVE NO HOME [A-10]: a permissible operating BAND (Walbro's GSS342 `15-90 PSI`) and a CEILING beside a working point (Delphi's FE0114 `System pressure 62 psi` with `Maximum pressure 85.0 psi`; Carter's M6626 `Maximum Pressure 9 PSI` / `Minimum Pressure 2 PSI`). Both are the standing bounds obligation [H2-f1] on a sixth trade, and the draft wrongly called all three houses' figures one fact. THE POOL NOW HOLDS THREE PRESSURE CONCEPTS AND THEY ARE CLEANLY SEPARATE, which is stated here because the b158 batch is where all three met [A11]: what a PUMP DEVELOPS is this; what a VESSEL OPERATES AT is `operating_pressure` (a multicooker's working pressure, a fact about the space inside a closed body); what a VALVE OPENS AT is `valve_opening_pressure` (a filter's bypass, a pump's limiting valve, a radiator cap's rating). Three questions, three slots, and no fourth was minted for the fuel trade. Optional on a pump: a mechanical lift pump is often published with a range and no single rating, which is the standing bounds obligation again.