ISO standards download ISO 748:2021 pdf download – Hydrometry — Measurement of liquid flow in open channels — Velocity area methods using point velocity measurements ISO 748:2021 pdf download - Hydrometry — Measurement of liquid flow in open channels — Velocity area methods using point velocity measurements 5.2 Demarcation of site 5.2.1 A permanent station, or one likely to be used frequently... 02-17 Download Now