建立了精密播种机接输种管后田间植株分布的动态模型。
A dynamic field plant distribution model with the seed drop tube is established in this paper.
悬索式管桥是长输管道跨越中常用的一种形式,其结构主要由主索、抗风索、塔基和锚固系统及梁式管桥等部分组成。
Suspension pipe bridge is a kind of common structural form consisted mainly of main cable wind cable tower foundation anchor system and girder form pipe bridge.
通清管技术在油气集输中是一种常用的用来清除管道内杂质、蜡、垢以及排空管道内存液的有效办法。
Passing ball cleaning pipe technique is a very effective method to clean up the impurity, wax and filthy and to exclude the existing liquid in oil gas transmission pipe.
前两种排沙方式已经广泛应用于工程实践中,平轴螺旋管流排沙是近年提出的一种节能、高效的输沙方式,目前还处于试验研究阶段。
The spiral flow in the horizontal pipe can generate the spiral flow to transport sediment according to the way of equipping the guide blade in the middle of the pipe.
前两种排沙方式已经广泛应用于工程实践中,平轴螺旋管流排沙是近年提出的一种节能、高效的输沙方式,目前还处于试验研究阶段。
The spiral flow in the horizontal pipe can generate the spiral flow to transport sediment according to the way of equipping the guide blade in the middle of the pipe.
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