Measurement and characterization of particles by acoustic methods - Guidelines for linear theory1 Scope This part of ISO 20998 describes ultrasonic attenuation spectroscopy methods for determining the size distributions of a particulate phase dispersed in a liquid at dilute concentrations, where the ultrasonic attenuation spectrum is a linear function of the particle volume fraction. In this regime, particleparticle interactions are negligible. Colloids, dilute dispersions, and emulsions are within the scope of this part of ISO 20998. The

The scope of this standard excludes radiotherapy simulators and systems where the image is created by a source other than an X-ray tube

This European Standard is not applicable to portable and/or hand-guided machines and appliances equipped with electrically

The definitions of security policies are outside the scope of this Recommendation | International Standard

which uses internally pressurized end-capped pipes

Closed containers

except rollers and horizontal directional drill

Pictorial and textual marking of handling information is not included (see BS 2770)

BS EN 15633‑1 on food allergens detection in foodstuffs is useful for:

BS EN 60811-512 on tensile strength and elongation at break of electric cables is relevant to:

and flicker on ac

dimensions and finish of washers generally used for packing purposes in aircraft

With the use of ISO 20887