coarse grain zone microstructure

• 粗晶区组织

coarse grain zone microstructure的用法和样例：

例句

1. So it was concluded that lower heat input and suitable preheated temperature should be adopted to control grain size and microstructure morphology.
   因此为提高焊接粗晶区的韧性，应采用小线能量和合适的预热温度来控制晶粒尺寸和组织形态。