裂纹

The effect of hydrogen on the change from ductile to brittle is to prevent nanocracks in DFZs from blunting into voids.

即氢使奥氏体不锈钢由韧变脆的根本原因是氢抑制了DFZ中纳米级微裂纹向空洞的转化。

In the lower right of this image the main breaching crack is visible.

… …在右下角的这个形象的主要违反裂纹可见。

Flash candling is a quality sorting operation which involves searching for several defects: cracks, blood spots, dirt spots, and undergrades, any one of this downgrade the egg quality.

在黑暗环境中，裂纹显示为明亮的线，血斑显示为红色的区域，污垢显示为黑点，蛋黄显示为黑色阴影，其中任何一种缺陷都会降低鸡蛋的品质。

The synergistic effect of Cu and Mn is listed as follows:(1) On improving the structure of rust layer, addition of Cu and Mn can reduce cracks and pores in rust layer;(2) On altering the composition of rust, it can increase the amount of Fe3O4 and γ-FeOOH, while decrease that of β-FeOOH;(3) On the chemical state of alloying elements and selectivity of rust layer, it mainly convert the anion selectivity to canoed selectivity;(4) On the electrochemical aspect, it can decrease the anode current density and increase the corrosion potential of steel.

Cu、Mn的协同作用主要体现在以下几个方面：在改善锈层结构方面，主要是减少锈层中的裂纹与孔洞，提高锈层与基体的结合强度；在改变锈层组成方面，增加Fe3O4和γ-FeOOH的含量，降低β-FeOOH的含量；在元素化学状态与离子选择性方面，促使锈层由阴离子选择性转变为阳离子选择性，抑制Cl-的渗透；在电化学方面，大幅度降低阳极电流密度，提高钢基体的自腐蚀电位。

It has been found that carburetting with graphite can efficiently prevent the surface crack of cast iron.

研究还证明，用石墨增碳可以有效地改善激光熔化区和合金化区的组织和性能，并且有效地防止裂纹的产生。

Discolor not exceeding 4 level, chalking not exceeding 3 level, cracking not exceeding 2 level, no sparkling, no shedding

变色不超过4级，粉化不超过3级，裂纹不超过2级，不起泡、不脱落

Functional glasses are mainly hard and brittle, and are difficult to machine because cracks and concavities are easily form on the machined surface.

针对功能玻璃硬度高、脆性大、容易在已加工表面产生裂纹和凹坑的特性，提出基于大刃倾角刀具的玻璃切削加工方法。

In order to solve this problem, a glass-cutting process by using a single- straight tool with big inclination angle is proposed, which helps to obtain integral surface without cracks and concavities in a culling depth at sub-millimeter level.

该方法能在亚毫米级的切削深度下高效地获得无裂纹和凹坑的完整表面。

However, many of them are not only hard but also brittle and are difficult to be machined by a cutting tool due that cracks and concavities form easily on machined surface.

但功能玻璃大都硬度高、脆性大，易在已加工表面产生裂纹和凹坑。

Precise cutting of glass using single-straight tool with big inclination angle is a new machining method in which integral surface with no cracks and concavities can be machined out high efficiently at the cutting depth of sub-millimeter level.

基于大刃倾角刀具的玻璃切削是一种新的加工方法，该方法能在亚毫米级的切削深度下高效地获得无裂纹和凹坑的完整表面。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。