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| 钢管冷拔 (【技】钢管冷拔工序是在热轧、挤压或焊接钢管之后对管材进行二次加工，以生产精密、薄壁和高力学性能产品的主要方法之一。通过冷拔，可将钢管直径和壁厚减缩到要求的尺寸，还可生产异形管和变断面管。) | |||
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