The two steps hardening appeared on the aging curve hints that two kinds of hardening mechanisms exist in aging process.
时效曲线上出现的二步硬化暗示在时效时有两种硬化机制在起作用。
The two steps hardening appeared on the aging curve hints that two kinds of hardening mechanisms exist in aging process.
时效曲线上出现的二步硬化暗示在时效时有两种硬化机制在起作用。
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