qualifier number + unit a measured amount

at pressure

also called measured at · reference pressure

THE PRESSURE A FLOW FIGURE WAS MEASURED AT, as a numeral with a pressure unit. A flow without its pressure is not a weak statement but an empty one - Walbro's GSS342 is published `255 LPH @ 40 PSI` and measured `261 LPH @ 43.5 PSI` on a pump whose stated operating range runs to 90 PSI - so it is required on every flow statement, exactly as `reference_temperature` is required on every viscosity and `filtration_efficiency` on every filtration rating. A NUMERAL AND DELIBERATELY NOT A TOKEN over a fixed set of test points: the sheets read at the mint publish at least six different ones - Bosch at 5, 7 and 8 bar, Walbro at 40 and 43.5 psi, Delphi's system pressure at 62 psi - and a closed vocabulary would have thrown most of them away. The live `reference_temperature` precedent, a numeral qualifying a numeral. Concern measurement.

At pressure is a measured figure, given in bar.

It is a qualifier of flow rate — it has meaning only inside a flow rate statement, never on its own. It belongs with flow rate to measurement — its measurable, physical facts.

It is answered inside every flow rate statement, not as a standalone question on a kind.

answered with: №number + unit — a number paired with a unit drawn from an exhaustive unit vocabulary.
value domain: Pressure units — the vocabulary its answers are drawn from.
qualifier of: flow rate — required_one per statement — it has meaning only inside that host's statement.

Answered inside every flow rate statement — not a standalone slot on any kind.