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1.According to reliability theory to design the safefy pin coupling, the problem can be solved satisfactory.
根据可靠性理论设计安全销联轴器，则较充分地考虑了某些参数变化性，更能贴近实际。收藏指正
2.Objective To compare the efficacy and safefy of patient-controlled analgesia (PCA) of intravenous sufentanil and epidural sufentanil combined with ropivacaine.
目的比较术后应用舒芬太尼经静脉或经硬膜外复合罗哌卡因进行患者自控镇痛(PCA)的临床效果和安全性。收藏指正
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