一个装配件在下达离散任务(Discrete Job)的时候，系统会取出它的BOM，把里面推式或拉式物料生成物料需求，而供应方式是虚拟件(Phontom) 的物料，就会继续展开它下一层BOM...
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对具有离散任务的控制系统提出了触摸屏和PLC控制联合应用的解决方法。
The solution to the control system of discrete tasks is put forward by united applying touch panel and PLC control.
对于仅需要改变状态并将其作为执行离散任务的一部分时，这是完成任务的简单方法。
For situations where you just need to mutate state as part of the execution of some discrete task, this is a simple way to accomplish that.
将单个的访问类与任务或离散操作联系起来。
Associates individual visitor classes with roles or discrete operations.
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