Where through hardness and the maxium strength associateed with it are not necessary,it may be more economical to gain the needed surface qualities by a casehardening process. 有些不需要同時(shí)具有高的強度和硬度的地方完全可以通過(guò)表面硬化工藝進(jìn)行強化使之在達到使用要求的同時(shí)又能夠節約成本。
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