布托啡诺伍用罗哌卡因在子宫切除术后硬膜外自控镇痛的临床研究
포탁배낙오용라고잡인재자궁절제술후경막외자공진통적림상연구
Investigation of the effect and safety for butorphanol combined ropivacaine used in epidural patient—controlled analgesia
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