ISO 20480-3:2021 pdf download – Fine bubble technology — General principles for usage and measurement of fine bubbles — Part 3: Methods for generating fine bubbles. 1 Scope This document describes methods for generating fine bubbles. 2 Normative references The following documents are referred to in the text in the sense that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 20480-1, Fine bubble technology — General principles for usage and measurement of fine bubbles...