The layers are defined by software that takes a series of digital slices through a computer-aided design.
这些层面是通过电脑辅助设计出的软件定义的，这个软件有一系列的数字片断。
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CONCLUSION: the finite element model of artificial disc replacement can be established by CT scanning, digital processor and computer aided design, and used for further study on spinal biomechanics.
This method provides an useful tool for researching into Computer Aided Modeling, Analysis and Design (CAMAD) of digital fiber optic communication links.