·2,447,543篇论文数据，部分数据来源于NoteExpress
系统采用了基于以太网的TCP／IP协议和分级式网络结构，具有层次化和模块化特点；
The system uses TCP/ IP protocol based on Ethernet network and adopts hierarchy architecture. It has the properties of hierarchy and modularization.
youdao
应用推荐
模块上移
模块下移
不移动