DIN EN IEC 63009:2021-04 Ultrasonics - Physiotherapy systems - Field specifications and methods of measurement in the frequency range 20 kHz to 500 kHz (IEC 63009:2019); German version EN IEC 63009:2019
2021DIN EN IEC 63009:2021 Ultrasonics - Physiotherapy systems - Field specifications and methods of measurement in the frequency range 20 kHz to 500 kHz (IEC 63009:2019); German version EN IEC 63009:2019