舒芬太尼复合罗哌卡因腰硬联合阻滞用于分娩镇痛的临床观察
서분태니복합라고잡인요경연합조체용우분면진통적림상관찰
Analgesia effect of combination of Sulfentanyl and Ropivacaine on combined spinal and epidural anesthesia for delivery
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