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BS PD IEC/TS 62903:2018

Ultrasonics. Measurements of electroacoustical parameters and acoustic output power of spherically curved transducers using the self-reciprocity method
standard by BSI Group, 01/29/2018

BS PD IEC/TS 62257-6:2015

Recommendations for renewable energy and hybrid systems for rural electrification . Acceptance, operation, maintenance and replacement
standard by BSI Group, 01/31/2016

BS PD ISO/TR 11364:2019

Gas cylinders. Compilation of national and international valve stem/gas cylinder neck threads and their identification and marking system
standard by BSI Group, 06/13/2019