The entry convergent flow pattern was observed with flow visualization technique when the resin melt flowed through a die featuring abrupt contraction in cross-section of channel and axial symmetry.
应用毛细管流变仪测量了在接近实际挤出工艺条件下低密度聚乙烯熔体的流变性质； 应用流动可视化技术，观测了试样熔体流经突然收缩的轴对称口模时的入口收敛流型。
This paper presents the design of a new degree of freedom-channel with variable cross-section design.
本文提出了一种新的设计自由度——变截面通道设计方法。
The size and position of the cross section of support beam, the opening direction of beam channel.
表面处理形式、状态；支撑梁的截面尺寸和位置，槽钢的开口方向。
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