硬膜外罗哌卡因复合舒芬太尼或芬太尼用于潜伏期分娩镇痛
경막외라고잡인복합서분태니혹분태니용우잠복기분면진통
Ropivacaine combined with sufentanil or fentanyl for labor analgesia in latent phase
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