adj.退過火的

動詞anneal的過去式和過去分詞形式.

Anneal means make harden steel soft and remove brittleness. 退火就是使淬火鋼變軟并消除其脆性。

Why shall harden steel be annealed? 淬火鋼為什么要退火呢?

Why shall harden steel be annealed ? 淬火鋼為什么要退火呢?

Three. They are hardening, temper and anneal. 三種。它們是淬火、回火和退火。

Three:they are hardening,temper and anneal. 三個過程：它們是淬火、回火和退火。

Three . They are hardening, temper and anneal . 三種。 它們是淬火、回火和退火。