If the red hot wire directly out of the cooling, the annealing is not complete, steel wire hardness, not easy to spring.
如果把烧红的钢丝直接取出冷却，则退火不完全，钢丝硬度大，不易绕制弹簧。
Copper wire color (dark red or white) : continuous annealing in the work period of the line burn soft and pass cooling section after cooling can achieve lead not hot, without water.
铜线变色(暗红或发白)：连续退火在工作段把线烧软，还要经过冷却段冷却后才能达到引出线不烫、不带水。
Copper wire color (dark red or white) : continuous annealing in the work period of the line burn soft and pass cooling section after cooling can achieve lead not hot, without water.
铜线变色(暗红或发白)：连续退火在工作段把线烧软，还要经过冷却段冷却后才能达到引出线不烫、不带水。
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