方法：分别采用冷浸法、匀浆-空化法、超声法、热回流法对长春花鲜叶进行提取并比较含量。
METHODS:Anhydrovinblastine was extracted from catharanthus roseus fresh leaves in different ways:merceration, homogenate-cavitation, ultrasonic wave method and hot reflux method.
分析结果表明，采用专用强化叶型、控制反动度、控制攻角等方法可以有效保证空冷机组变工况安全高效运行。
It is shown from the results that the security and efficiency for LP last stage blade of air-cooling units can be obtained through adopting special profile, controlling reaction and incidences.
能量性能和空化性能是平面叶栅的基本特性。
The energy and cavitation performances are the basic characteristics of 2-D cascade.
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