The (graphite) crystallites in the outer layer of the carbon fibers are large with few pores, while the inner crystallites are small with many pores.
原丝经过预氧化后仍保持原来的微原纤结构，纤维外部表层的石墨微晶较大，所含孔隙较少，内部的微晶较小且含有大量孔隙。
Because of its small screening radius and short delay time, graphite is chosen as the cathode material.
在电子束产生过程中，屏蔽半径应尽可能地小，且击穿延时时间较短，故选择石墨作为阴极材料。
Such small tolerances require careful design and machining of the graphite boat and slider so that the sliding motion is smooth and without jitter.
这样小的公差要求仔细设计和精心加工石墨舟皿和滑动器，从而使滑动器的滑动平滑而没有跳动。
The mixing techniques of small grain are related to the quality of a fine grain graphite.
在相同工艺条件下，采用细颗粒配料方式的石墨力学性能更好；
In this paper, research is done on alloy TC4 machined by EDM using graphite electrode. Positive polarity machining should be used whether the pulse width is big or small.
对使用石墨电极进行电火花加工钛合金tc4进行了研究，认为无论脉宽大小均应采用正极性加工。
The experimental research on 'diffusion bonding of spheroidal graphite cast iron and copper is conducted by adopting the self-made equipment of small vacuum diffusion bonding.
采用自制的小型真空扩散接合装置，进行了球铁与铜扩散接合试验研究。
Each cone in a nodular graphite is composed of many microcrystallites with a small angle each other in their orientations.
通过微区分析还发现球墨内部的角锥体是由许多取向略有差异的微晶所构成。
It is easy to cause various defects while using small cupola to smelt the nodular graphite iron.
采用小型冲天炉熔炼球铁，易于产生各种缺陷。
With the increase of graphite, the maximum temperature difference between different cathodes is small, while the average temperature of bottom surface is enlarged.
炭块的位移增大，而炭块内的最大热应力有不同程度的降低。
With the increase of graphite, the maximum temperature difference between different cathodes is small, while the average temperature of bottom surface is enlarged.
炭块的位移增大，而炭块内的最大热应力有不同程度的降低。
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