生产螺旋弹簧的卷取机精密的决定性零部件的主要生产者，MN，圣保罗弹簧抓。
Coil springs are a crucial component for Reel Precision Manufacturing of St. Paul, MN, a leading producer of wrap spring clutches.
针对热轧带钢因卷取后钢卷内外圈与芯部的冷却速度不同，导致带钢成品头尾强度高、塑性低的问题，提出了卷取温度凹型控制模式。
U-shaped control model for coiling temperature was put forward to improve the high strength and low plasticity of head and tail of hot rolled strip.
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