1. What do you mean by anneal? 
   你说的退火是什么意思？
2. Three. They are hardening, temper and anneal. 
   三种。它们是淬火、回火和退火。
3. Anneal means make harden steel soft and remove brittleness. 
   退火就是使淬火钢变软并消除其脆性。
4. Anneal means to make harden steel soft and remove brittleness. 
   退火就是使淬火钢变软并消除其脆性。
5. anneal or toughen by a process of gradually heating and cooling. 
   通过逐渐加热和冷却的过程来锻炼或使变坚韧。

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• 1. 石墨化退火
  涂石墨，石绵绳 graphite a shestos yarn...石墨化退火 graphite anneal-ing...石模，石绵，衬垫 graphite ashestos packing
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