However copying or reverse engineering in this area is far from a simple task.
在这一领域中，无论是复制还是逆向工程都不是一件轻松的任务。
A patent prevents direct copying, but does not prevent learning from a new product or developing a competing product through reverse engineering.
专利权能够阻止直接的复制，但是不能阻止学习新产品的行为、或通过反向工程学开发可与之竞争的产品的行为。
Reconstruction and copying machining of existing freeform surface are one of key technology in reverse engineering.
现有自由曲面的重建与仿形制造是反求工程中的关键技术之一。
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