You will note that you will find a small spot centered in a larger circle.
你会注意到,在大的圆环中有一个很小的点。
When the beam is focused to a small spot, its power density is raised to produce sufficient heat to vaporize any material.
当光束在一个小点上聚焦时,其功率强度得以提高,并产生足够的热量来汽化任何材料。
When the beam is. focused to a small spot, its power density is. rais. d to produce sufficient heat to vaporize any material.
当光束在一个小点上聚焦时,其功率强度得以提高,并产生足够的热量来汽化任何材料。
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