【发动机电机】Radial engine nine cylinders九缸星形发动机3D图纸

【飞行模型】小熊遥控3D打印模型飞机3D图纸 stp x_t stl 3mf等格式https://grabcad.com/library/carbon-cub-snowy-rc-3d-printed-model-airplane-diy-project-1来源：机械图纸狗