弧形冠部设计，刀翼式分布。

Arc crown profile, blade cutter setting.

youdao

短抛物线外型，四刀翼设计。

Short parabolic profile. Four blades design.

youdao

短抛物线外型，六刀翼设计。

Short parabolic profile. Six blades design.

youdao

短抛物线外型，六刀翼设计。

Short parabolic profile. Six blades design.

youdao