· 2020. 11. 24. · 11.040.50 c 41 yy/t 0939—2014 (bua) ultrasound bone sonometers— test...
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- · 2020. 11. 24. · 11.040.50 C 41 YY/T 0939—2014 (BUA) Ultrasound bone sonometers— Test method of broadband ultrasound attenuation (BUA) 2015-07-01
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