文中还给出了进口业务的流程图，这也是软件设计中简化的流程图。
The flowchart of the import business which can simplify the software is also given.
介绍了基于PROFIBUS的甲烷浓度监测系统，给出了部分简化程序流程图。
Methane density monitoring system based on PROFIBUS technology was introduced in this paper. It also displayed simplified flow process chart.
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