visual examination

基本解释

If the test piece fails to comply with any of the requirements for visual examination or NDT specified in 7.5, one further test piece shall be welded and subjected to the same examination.
如果试件不符合7.5规定的外观检查或非破坏性检查的要求，应再取一个试件进行焊接，并进行同样检查。
By using visual examination, scanning electronic microscope, X-ray energy spectrum and metallurgy and chemical analysis, the cause of crack occurred in bellow expansion joint was analyzed.
采用宏观检查、扫描电镜、X射线能谱、金相分析及化学分析等方法，对金属波纹膨胀节开裂的原因进行了分析。
Visual examination detected blood spatter contamination in 50.5% (303/600) of the face shields, whereas leucomalachite green staining detected blood contamination in 66.0% (396/600).
肉眼可见的污染见于50.5%（303/600）面罩，而隐色孔雀绿染色可在66.0%（396/600）的面罩中检测到。