For maximum softness and ductility the cooling rate should be very slow, such as allowing the parts to cool down with the furnace.
为了得到最大柔软性和延展性冷却速率应该很慢，比如让零件与炉子一起冷下来。
It is necessary to elaborate on the definition of a fatigue coefficient such as that for ductility.
有必要对疲劳系数，如延性系数的定义作详细讨论。
Aluminum board is rolled as figured board to increase its strength and ductility. Can reduce the thickness of using and increase its lifetime.
铝板经轧花，比平面铝板的强度、韧性增加，可降低使用厚度，延长使用寿命。
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