Ophthalmic optics. Contact lenses - Physicochemical properties of contact lens materials1 Scope This document specifies the methods of testing the physicochemical properties of contact lens materials. These are extraction, rigid lens flexure and breakage, oxygen permeability, refractive index and water content.

surface acoustic wave resonators are resonators using multiple reflections of surface acoustic waves

This European standard specifies the technical

Temperature influences the activity of fungi and insects responsible for the bio-deterioration of organic materials

• Reference data

It can be transmitted through both satellite (DMB-S) and terrestrial (DMB-T) methods

ISO 34101-4 is an international standard that provides requirements for certification schemes of sustainable and traceable cocoa to apply for the certification of cocoa production

Why should you use BS 2889 - Trash content by Shirley Analyser

Note: Testing to IEC 60332-1-3 may be performed simultaneously with that to IEC

motional resistance

the Logical Link Control (LLC) sub-layer and the ‘Convergence’ sub-layer

BS EN 71‑8 specifies requirements and test methods for activity toys for domestic use often attached to or incorporating a crossbeam

and building works