Certain process structure can be viewed as a graph. Nodes in it indicate activities and lines denote directioncontrol.
确定型的流程结构可以看成是一个图，图中的点表示流程活动，边表示流程流向控制。
2
Through the field tests, the machine reaches the aim to resolve effectively the difficult problem on directioncontrol during horizontal drilling.
该设备经过现场试验，取得了理想的效果，有效地解决了水平螺旋钻机钻进过程中控向的难题。
3
This paper USES polynomials to express the load characteristics of the automobile engine, and presents simplified structure velocity and directioncontrol models.