主要有裂纹、凹陷和镦粗、表面蚀坑、崩落等。
There are mainly crack, depression, upset, pit on the surface, breakout, etc.
该基板的该底表面形成一第二凹陷部。
A second concave part is formed on the bottom surface of the base plate.
该基板的该顶表面形成一第一凹陷部。
A first concave part is formed on the top surface of the base plate.
该基板的该顶表面形成一第一凹陷部。
A first concave part is formed on the top surface of the base plate.
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