从合理性、可靠性和经济性出发，确定采用分监控中心—总监控中心和监控单元—分监控中心—总监控中心的混合式拓扑结构形式。
A mixed topology structure with supervision station - supervision center and supervision unit - supervision station - supervision center is proposed for rational, reliable and economical reasons.
从合理性、可靠性和经济性出发，确定采用分监控中心—总监控中心和监控单元—分监控中心—总监控中心的混合式拓扑结构形式。
A mixed topology structure with supervision station - supervision center and supervision unit - supervision station - supervision center is proposed for rational, reliable and economical reasons.
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