细晶的合金组织有助于改善铜铬触头材料的电性能。
Fine microstructure is beneficial to improving the electric properties of contact materials.
为什么在温度变化时雪晶的形状也随着变化，从薄且平的盘状变成长且细的针状，这仍是一个科学之谜。
Why snow crystal shapes change from thin, flat plates to long, slender needles when the temperature changes remains something of a scientific mystery.
等径弯曲通道变形（简称ECAP）具有获得超细晶组织和改善力学性能的潜力。
The equal-channel angular pressing (ECAP) had achieved the potential for obtaining ultra-fine grain and improving mechanical properties.
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