A thin surface layer always exists near the surface of laser heating melt pool due to the fluid flow driven by the surface tension gradient.
在激光材料加热中，由于存在着表面张力驱动的流动，熔池表面附近熔体的速度梯度很大。
A thin surface layer always exists near the surface of laser heating melt pool due to the fluid flow driven by the surface tension gradient.
在激光材料加热中，由于存在着表面张力驱动的流动，熔池表面附近熔体的速度梯度很大。
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