The experimental result shows that the depth of hardened zone and smoothness of surface can be controlled conveniently by varying the power output beam diameter and scanning rate of laser light.
试验表明：通过调节激光器的输出功率、光斑直径和扫描速度可以方便地控制熔化层深度和表面平整度。
Effect of aircraft surface smoothness requirements on cost.
飞机表面光滑性要求对成本的影响。
Smoothness: Evenness of paper surface. A paper characteristic requiring consideration when printing solids and half-tones.
平滑度：纸张表面的均匀程度。印半色调图片或实地时，需要考虑的纸张特性。
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