迎角叶片，位于机身侧的可动小翼面。为失速警告系统传输飞机对气流的相对角度。

ALPHA VANE, a small moveable airfoil on the side of the fuselage transmitting airplane Angle relative to airstream for the stall warning system.

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试制的新模具，可锻出高精度的增压器动叶片。 新模具在动负荷下工作，具有硬度高、变形小、寿命长的特点。

The new dies developed can forge high-precision rotary blades forsuperchargers and, when working under dynamic loads, have the features of goodhardness, small deformation and long service life.

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