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vein valve
释义
vein valve
Encyclopedia
医学
静脉
释
vein valve
静脉瓣
静脉内防止血液逆流的瓣膜。是由内膜凸入管腔折叠而成的两个彼此相对的半月形薄片。
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X-ray sun
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X-ray transmission imaging inspection device for scanning luggage and package
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XRB
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XRF calcium and ferrum analyzers
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