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lead tempering bath 回火铅槽
Three carbon potentials, two quenching methods, three quenching temperatures, five tempering temperatures can finally lead to different tempering curves.
用三种碳势、两种淬火方式、三种淬火温度、五种回火温度得出不同含碳量、不同淬火工艺、不同淬火温度的回火曲线。
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