在圆管与圆管的爆炸复合研究中，需要对管的动态参数做定量的估计。
In the research of explosive welding between tubes, it is necessary to evaluate quantitatively the parameters of the moving tube.
冷弯空心型钢是冷弯型钢中的一类重要产品，其通常包括圆管、方、矩形管以及按照特殊要求制作的异形管。
Cold-roll void forming sheet is an important product in cold-roll forming sheet, which usually includes pipe, square tube, rectangle tube and unusual tube made by special requirements.
埋设在高等级公路中的钢筋混凝土圆管涵属于上埋式管涵，作用于其上的竖向土压力影响因素繁多，分析极其复杂。
There are many factors to influence the vertical earth pressure on the reinforced concrete culvert, so it is very difficult for the analysis.
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