罗比卡因硬膜外联合腰麻和硬膜外麻醉用于分娩镇痛的临床效果比较
라비잡인경막외연합요마화경막외마취용우분면진통적림상효과비교
Clinical comparison of ropivacaine for combined spinal epidural analgesia and epidural analgesia
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