提出了面向产品族的工艺模板分层结构树的组织模式。
The organize model about the process planning matchboard oriented product family is brought forward.
应此有人提出了分层介质结构，来研究超声在生物组织中的传输和分布。
So someone purposed layered media structure to study transmission of biologic structure.
应此有人提出了分层介质结构，来研究超声在生物组织中的传输和分布。
So someone purposed layered media structure to study transmission of biologic structure.
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