The article compares the accuracy among three mathematical models for calculating the change of W. t during sink drawing and explains the method of assessing models accuracy.
比较了三个计算空拔管壁厚变化数学模型的精度，阐述了评定模型精度的方法。
In dawns to come, Mars and Jupiter will continue to rise while Venus and Mercury sink toward the horizon, drawing closer to the rising Sun.
随着黎明的到来，火星和木星将继续上升，而金星和水星则落向地平线，向着升起的太阳靠近。
Introduced here in the article are the newly developed sink-drawing technology for making tube for motor rear-view mirror support, covering the shaping method and manufacturing process.
介绍了新型无模拉伸加工汽车后视镜支杆的成型方法及生产工艺。
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