91/26432 DC被替代
Iec Xxxx Guidance For The Measurement And Characterization Of Ultrasonic Fields Generated By Medical Ultrasonic Equipment Using Hydrophones In The Frequency Range 0.5 Mhz To 15 Mhz Ultrasonic Transducers Having Cylindrical Or Spherical Active Elements (iec 87(secretariat) 25)
出版：British Standards Institution
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