Polyvinyl chloride insulated cables of rated voltages up to and including 450 750 v . part 13 : oil resistant pvc sheathed cables with two or more conductors 额定电压450 750v及以下的聚氯乙烯绝缘电缆.第13部分:两股或多股导线的耐油pvc铠装电缆
Ng its running . it takes multiple strands of steel wire ropes or terylene ropes to wind spirally in the width of the belt and , the tracks where these ropes go are defin 它采用多股钢丝绳或涤纶线绳沿胶带宽度螺旋形地绕布,其位置定为同步带的节线。
The flow characteristics , eddy structure and energy dissipated mechanism of multi - horizontal submerged jets ( mhsj ) are studied by means of 3 - d numerical simulation 摘要采用三维数值模拟，研究了多股多层水平淹没射流的流动特性、漩涡结构和消能机理。
So it could be concluded that the flow in the tortuous path was really spiral flow , and the experiments showed that the there had many spirals and even reverse spirals coexisted in the path 但试验表明，弯道中会存在多股螺旋流，甚至有转向相反的螺旋流同时共存。
For example : 1 . prolonging compensation lead of precision grade connecting with k dividing code thermocouple , owning pvc insulation and sheath multi - strand conductor shield knited by tinning copper thread 例： 1 .与k分度号热电偶连接的延长型精密级补偿导师线最高使用温度105聚氯乙烯绝缘和护套，多股绞合导体，镀锡铜线编织屏蔽。
The results show that an eddy surrounding the main stream of the multiple jets exists and forms several strong shear flows and enhances the effect of energy dissipation 研究结果表明：多股多层淹没射流利用在射流轴线周围所形成的强剪切、三维立体漩滚的剧烈混掺来实现消能，消能率较高，且在平面上没有形成明显的、贯穿的立轴漩涡。
Based on the 3 - d numerical simulation and the model test , many factors affecting the flow pattern stability and the hydraulic characteristics of the horizontal submerged jets are studied 摘要采用数值模拟和模型试验相结合的方法，分析了水股分层、坎高、出口体型和跌坎形式等因素对多股水平淹没射流的流态稳定性和水力特性的影响。
The results show that multi - lever and multi - strand horizontal submerged jets are a new energy dissipation type and have better stability of flow patter , lower velocity in the slab and higher dissipated energy rate than the single - lever and the multi - strand horizontal submerged jets 研究表明，多股多层水平淹没射流较单层多股水平淹没射流流态稳定性好、临底流速低、消能率高，是一种高效的新型消能方式。
Brings forward the basic network cell model of symmetrical blast vault and asymmetric blast vault . then studies and analyses airflow in vault of main voltage switchyard hall of xiluodu hydropower station which is far cry and large numbers of airflow conflux , brings forward concept of “ virtual embranchment ” and corresponding basic network cell model , regresses calculate expressions of flux uniformity coefficient and impedance of “ virtual embranchment ” of vault of main voltage switchyard hall of xiluodu hydropower station 而后又采用cfd数值模拟的方法对溪洛渡水电站主变洞排风拱顶这种多股气流汇流的长距离通道内的气流流动进行了分析,提出了“虚拟分支”的概念和相应的网络基元模型,并回归得到了溪洛渡水电站主变洞排风拱顶各个排风“虚拟分支”风量均匀系数以及阻抗的计算公式。
