In some sectors certain operating conditions (such as the petroleum sector, pipeline), not allowed to use the path contraction of the valve.
在某些部门的某些工作条件下(如石油部门的输油管线)，不允许采用通径收缩的阀门。
This aspect is to reduce the pipeline pressure loss, the other is to avoid the path contraction obstacle to the mechanical cleaning pipelines.
这一方面是为了减小管线的阻力损失，另一方面是为了避免通径收缩后给机械清扫管线造成障碍。
In this paper we discuss the distribution of vertices of degree 5 on the longest path and cycle and thus give a characterization of contraction critical 5-connected graph in a certain aspect.
讨论收缩临界5 -连通图最长路和最长圈上5度点的分布情况，刻画收缩临界5 -连通图的结构。
In this paper we discuss the distribution of vertices of degree 5 on the longest path and cycle and thus give a characterization of contraction critical 5-connected graph in a certain aspect.
讨论收缩临界5 -连通图最长路和最长圈上5度点的分布情况，刻画收缩临界5 -连通图的结构。
应用推荐