Melt pumping characteristics, velocity and shear rate distribution profiles of the screw assemblies are analyzed and discussed.
分析并比较了组合螺杆的熔体输送特性、速度场和剪切速率场分布规律。
Products included are bolts, screws, studs, U-bolts, preassembled screw and washer assemblies (sems), and products manufactured the same as sems except without washer.
产品包括：螺栓、螺钉、螺柱、U型螺栓、预装配的螺钉和垫片组件以及与预装配组件一样加工的无垫圈产品。
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