It disusses the main problems about selecting new types of lower loss power transformer,such as the relationship between the loss and standard series、operating cost,the relationship between the capacity selection and service life loss calculation etc.
论述了新型低损耗电力变压器的选用中容易遇到的主要问题 ,如损耗与标准系列、运行成本问题、容量选择与变压器寿命损失计算问题等 ,充分考虑变压器运行弹性及实际负荷曲线 ,选择最佳性能价格比的产品。
Effects of different ratios of concentration and volume of bupivacaine and fentanyl on postoperative epidural analgesia;
布比卡因和芬太尼浓度与容量匹配对肝脏术后硬膜外镇痛效应的影响
Clinical observation on interscalene brachial plexus block with ropivacaine of two different volumes;
两种不同容量罗哌卡因用于肌间沟臂丛神经阻滞的临床观察