The production line used by the heat treatment process are: quenching and tempering of the two.

该生产线所使用的热处理工艺有：淬火和回火两种工艺。

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The production line used by the heat treatment process are: quenching and tempering of the two.

该生产线所使用的热处理工艺有：淬火和回火两种工艺。

youdao