specification description language造句

Integrated services digital network ; user - network interface layer 3 ; specifications for basic call control ; specification description language diagrams ; english version ets 300102 - 2 : 1990
综合业务数字网络.用户-网络-接口层3 .基本呼叫控制规
Based on 3gpp release ' 99 standard , the system control soft of the project is written for the three protocol layers mentioned above . the implement tools are the real time multi - tasking operating system , psos , and specification description language , sdl
课题的系统控制软件部分，是根据3gpprelease ' 99标准，以psos实时多任务操作系统为平台，利用规格描述语言? sdl语言对上述三个协议层进行软件编制。
It's difficult to find specification description language in a sentence. 用specification description language造句挺难的