When metal gets hot, it expands, and during these types of marks, we actually have to lock the metal in place, because the laser is generating so much heat, the material begins to warp.

当金属变热时，它会膨胀，在这些类型的标记中，我们实际上必须将金属锁定在适当的位置，因为激光产生了如此多的热量，材料开始扭曲。