Standard Test Method for Determining Chemical Compatibility of Substance s in Contact with Thermoplastic Pipe and Fittings Materials shop-only This standard applies to quartz

This standard applies to quartz crystal oscillators and SAW oscillators used in electronic devices and modules that have the multiplication or division functions based on these oscillators

BS EN 4192 on Aerospace tees for pipe couplings is useful for:

by use of a barrier pipe

BS EN ISO 8253-2 is to ensure that tests of hearing

Definitions of parameters describing wavefront deformations are given together with methods for the determination of those parameters from phase distribution measurements

Standard Test Method for Determining Chemical Compatibility of Substance s in Contact with Thermoplastic Pipe and Fittings Materials shop-only This standard applies to quartz