干道网 meaning in Chinese

mains

Yin - shang dynasty carried out the principle for choice of defense system by putting the city in the center and constructed the defense protective screen around the city through setting up many layers of defense installations ; and set up several circles of important military towns on the periphery ranges , where set up military pre - alarm and information transmitting systems fitted with main - way nets and post systems extending to all directions , so as to form the state military defense systems
摘要殷商国家施行“都城居中”的选址原则，通过建造都城的多重防御设施，构建都城周边的军事防御屏障，并在周边地区分设若干军事重镇环带，建立周边地区的军事预警和信息传递系统，配之以四通八达的干道网和驿站制度，从而形成国家军事防御体系。