UNE-EN IEC 61828:2021 Ultrasonics - Transducers - Definitions and measurement methods regarding focusing for the transmitted fields (Endorsed by Asociación Española de Normalización in March of 2021.)
2021UNE-EN IEC 61828:2021 Ultrasonics - Transducers - Definitions and measurement methods regarding focusing for the transmitted fields (Endorsed by Asociación Española de Normalización in March of 2021.)