经腔内端式探头及高频探头在肛周脓肿超声诊断中的应用价值比较
경강내단식탐두급고빈탐두재항주농종초성진단중적응용개치비교
A comparison of the application value of end-fire type intracavitary transducer and high frequency transducer in ultlasonic diagnosis of perianal abscess
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