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BS EN 60444-9 on the measurement of spurious resonances of piezoelectric crystal units is useful for:
is provided in Annex B (informative)
By adopting the guidance in BS EN 754-4
d) defines concepts specific to this part of ISO/IEC 13249
Specification for two component epoxy primer for aerospace purposes Ingestion-build-209418 BS EN 60444-9 on the1 Scope This British standard specifies requirements for the materials and performance of two types of strontium chromate pigmented two pack resin based primer, for air drying at ambient temperature, for aerospace applications. Type A materials are intended for application to chemically pretreated substrates (e. g. by a chromate conversion process) suitable for general applications. Type B materials are similar to type A but with improved tolerance to