左旋布比卡因罗哌卡因混合苏芬太尼用于腹部术后镇痛的效果
좌선포비잡인라고잡인혼합소분태니용우복부술후진통적효과
The curative effect of laev-bupivacaine or ropivacaine compined with thero-fentanyl for patient-controlled epidural analgesia after abdominal operation
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