That is the Closed (Sealed) Supply Chain. Three different ways to keep food under supervision were proposed: market access model by government, multi-nodded detect model by producers and information traceback system model of consumers.
本文从食品供应链运行模式的角度出发,论述了针对食品安全的封闭供应链的运行模式,提出了封闭供应链运行模式中的三种封闭方式,即政府主导的市场准入封闭方式、生产者主导的多极检测封闭方式和消费者主导的信息追溯封闭方式。
参考来源 - 我国城市食品封闭供应链运行模式及其政策研究·2,447,543篇论文数据，部分数据来源于NoteExpress
NET的OPC的物流控制系统设计思路和调度原则，详细阐述了信息追溯系统的工作原理和相关问题分析。
NET OPC logistics control system design mentality and the dispatcher principle, elaborated principle of work and the related problem analysis about the information backward system in detail.
经纪业可以追溯到几百年前，但由于信息技术的发展，它现在正在迅速变更。
The brokerage goes back many hundreds of years, but it's in rapid change now because of information technology.
这样的文档不但会很快就难于维护，而且读者会被文字中的追溯信息搞乱，这使得文档很难阅读。
Not only can such a document very quickly become difficult to maintain, the reader is distracted by traceability information within the text, making the documents difficult to read.
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