以工程实例为基础，对使用外部定时器时给P LC系统带来的时间竞争问题进行分析，并提出解决措施。
Based on instances, the paper analyses the time conflict of PLC system caused by exterior timer, and provides the solution to the problem.
在分析现有供应链计划模式不足的基础上，为实现基于时间竞争的目的，提出了基于预订单思想的计划模式。
Based on analysis of the insufficient plan modes which are widely used now, a new plan mode, Predict-order mode in supply chain was proposed for Time Competition.
在分析现有供应链计划模式不足的基础上，为实现基于时间竞争的目的，提出了基于预订单思想的计划模式。
Based on analysis of the insufficient plan modes which are widely used now, a new plan mode, Predict-order mode in supply chain was proposed for Time Competition.
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