不同需要可选用不同的物镜，例如，投影物体轮廓和外形的投影仪，物镜应较好地矫正畸变和像场弯曲；
For example, Projection objects profile and appearance of the projector. The objective should be better correction distortion and like a crooked.
不同需要可选用不同的物镜，例如，投影物体轮廓和外形的投影仪，物镜应较好地矫正畸变和像场弯曲；
For example, Projection objects profile and appearance of the projector. The objective should be better correction distortion and like a crooked.
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