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BS

BS PD IEC TS 62903:2023

Ultrasonics. Measurements of electroacoustical parameters and acoustic output power of spherically curved transducers using the self-reciprocity method
standard by BSI Group, 06/27/2023

BS

BS 4559-9.1:1988

Methods for preparation of calibration gas mixtures. Comparison methods and methods for establishing traceability-Determination of composition by comparison methods
standard by BSI Group, 02/29/1988

BS

BS 601-4:1973

Specification for steel sheet and strip for magnetic circuits of electrical apparatus-Thin magnetic steel, less than 0.25 mm thick
standard by BSI Group, 07/16/1973