1969年，北京量具刃具厂开始采用光亮淬火。
In 1969, the following enterprise by Beijing gage start light quenching.
本文提出了一种研制无添加剂光亮淬火油的新方法。
A new method is introduced in this paper on bright quenching oil without additives.
AO32该油属高速光亮淬火油，适用于大量工作一起淬火。
AO32 the oil is of high speed bright quenching oil, quenching for large work together.
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