4040| 12
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這種工件淬火后薄壁處吃得消嗎,? |
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點(diǎn)評(píng)
表面淬火是咋樣加熱,?加熱過(guò)程要多久時(shí)間,?這時(shí)間內(nèi)材料的變化又會(huì)咋樣?
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