UNE-EN 61689:2013 Ultrasonics - Physiotherapy systems - Field specifications and methods of measurement in the frequency range 0,5 MHz to 5 MHz (Endorsed by AENOR in June of 2013.)
2013UNE-EN 61689:2013 Ultrasonics - Physiotherapy systems - Field specifications and methods of measurement in the frequency range 0,5 MHz to 5 MHz (Endorsed by AENOR in June of 2013.)