"If you degrade the matrix too much, you lose the patch," he warns.
他警告说：“如果使基质分解过多，修补工作就无法进行了。”
If the wall bear force of the cutting, metal particles from the matrix and erosion.
如果管壁经受不起合力的切削作用，就有金属颗粒脱离母体而流失。
If the wall bear force of the cutting, metal particles from the matrix and erosion.
如果管壁经受不起合力的切削作用，就有金属颗粒脱离母体而流失。
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