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Ball centre position X determines the difference between the theoretically correct position of each ball’s centre and the actual position
BS EN 60444-9 on the measurement of spurious resonances of piezoelectric crystal units is useful for:
d) defines concepts specific to this part of ISO/IEC 13249
It has been sponsored by the University of Portsmouth
By adopting the guidance in BS EN 754-4
Specification for two component epoxy primer for aerospace purposes Ingestion-build-209418 Ball centre position X determines1 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
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