The unsuitable carbonitriding process, internal oxidation, over deep depth of carbonitrided layer and crust like C N compound on the surface are the main reasons to cause fracture.
碳氮共渗工艺选择不当，共渗层过深，表面出现壳状碳氮化合物、内氧化等缺陷组织是造成其断裂的主要原因。
The relation coefficient between regression equation and oxidation curve is over 0.9 and the rules of oxidation - temperature and oxidation - time are parabolas.
由计算得到的氧化回归方程与氧化曲线的相关系数可达到0.9以上，高温氧化烧损量与温度和时间均呈抛物线规律。
The main causations for the precipitate in amur grape wine are microzyme self-dissolve, microbial contamination, excessive oxidation and over quantity of tarter muriatic acid etc.
山葡萄酒浑浊的主要原因有酵母菌自溶、微生物污染、氧化过度、蛋白质和酒石酸盐过多等。
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