相同浓度布比卡因和罗哌卡因用于腰-硬联合阻滞分娩镇痛的观察
상동농도포비잡인화라고잡인용우요-경연합조체분면진통적관찰
Observation of the same concentration of bupivacaine and ropivacaine for combined spinal epidural labor analgesia
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