提出了一种简化的确定关键路径方法，该方法可分别运用于单代号和双代号网络图中。
This paper put forward a simplified method that can be used on activity on node network and activity on line network to identify the critical path of schedule.
将双代号网络计划放在时间坐标里，编制成“时标网络”，使网络图的识读变得容易。
The 'time scale network' was worked out by building the dual-code network plan into the time coordinate, which can make the network graph more readable.
双代号网络图中，虚工作和实工作有着本质的区别，其主要作用是传递工作之间的逻辑关系。
In the activity-on-arrow network, there are essential differences between positive activity and dummy activity.
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