subsurface defect meaning in English

面下缺陷
内部缺陷

Evaluation of subsurface defect by pulsed phase thermography
亚表面缺陷脉冲相位热成像检测技术
Thermal wave scattering of subsurface defects in solids based on non - fourier ' s models
固体中亚表面缺陷的非傅里叶热波散射问题
In this thesis , based on related previous references , using the non - fourier law of heat conduction , applying the image method , expand method of wave function , multiple scattering of thermal waves in materials with subsurface defects are investigated . our research works are concretely as following
本文在分析了国内外相关文献的基础上,基于非傅里叶热传导波动方程,采用镜像方法和波函数展开法,研究了固体介质中亚表面圆柱缺陷和球形缺陷对热波的多重散射问题。