配上不同的颜色玻璃和不同的发散透镜，可获得各种颜色、各种发散角的扇形光束。
Sector beams in different colors and with different angles of divergence are available when equipped with different color and divergent lenses.
两个悬臂在两个扇形面内的摆动，使激光束与板材产生任意的相对运动。
Two cantilevers swing in two sector surfaces so as to lead the laser beam and the plate to generate relative motions freely.
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