（来源：江西食品药品监管）
参考文献
[1]https://www.cqch.cn/departments_csyxka0_kpzs/2014/vbmQX9bY.html
[2]https://www.cqch.cn/departments_csyxka0_kpzs/2017/zbqYL0bp.html
[3]https://www.laszyy.cn/news/details/45917.html
[6]https://researchain.net/zh-hans/fact/from-sound-pressure-to-flow-why-is-acoustic-impedance-so-critical-in-sound-transmission
[8]https://thehealth-magazine.co.uk/what-is-a-pelvic-scan-looking-for/
[9]https://jupiterscan.com/sonography/
[10]http://www.ultrasmicro.com/sys-nd/120.html
[11]https://biomedart.cn/
[12]https://rfidtag.com/nfc-vs-rfid-whats-the-difference/
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(绝经后可以做阴道镜吗))