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You don't have permission to access /newshow-矩形管件的表面通过快速加热到临界温度以上,但热量还未来得及传到心部之前迅速冷却,这样就可以把表面层被淬在马氏体组织,而心部没有发生相变,这就实现了表面淬硬而心部不变的目的,适用于中碳矩形管.html on this server.


Apache/2.2.15 (CentOS) Server at www.fgp8.com Port 80