The discussions about the techniques know-how of MBO have been so common but the economic explanations and comments of MBO under the specialtransformation background are few.
The idea of the design method throws off the reliance on the engineering experience, avoids complicated specialtransformation, and has the blade profile and impeller optimized.
本文的设计思想，减少了对工程经验的依赖，避免了复杂的空间转换，可使叶型和叶轮得到优化。
3
Interceptors are a special kind of invokers that provide additional function, such as data transformation, security, and transaction control.