The strategic separation of concerns between the value chain and the SDLC provides for the classification of the SDLC as a supply chain.
在价值链和SDLC之间对关注进行策略分割，为SDLC的分类提供了一个供应链。
The design thoughts of RS 485 communication controller based on SDLC, SDLC protocol and RS 485 protocol are introduced.
提出一种基于SDLC协议的RS 485总线的通信控制器的设计思想。
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