英语词典
In diffusion layer , cracks were found after hardening and tempering.
调质使得扩散层产生裂纹.
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Microstructure and tribological properties of two Febased sintered materials after widebond laser surface hardening were studied.
研究了两种不同成分铁基烧结材料激光扫描后的显微组织和摩擦学特性.
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