说明如何修改型别成员。
作为一种双座改型，歼教-7的研制中对歼-7的机体做了较多修改。
As a dual-seat variation, the FT-7 has numbers of differences to the F-7.
通过评价这些参数，对叶片型线进行了修改，获得了比较满意的结果，为叶轮的改型设计提供了一条较有价值的新途径。
By comparing THC parameters, the impeller shape may be remade for obtaining good results. The method provides a valuable reference and new way...
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