表面检验 meaning in Chinese

external examination

Testing the surfaces of installed refrigerators and freezers
安装冷藏和冷冻设备的表面检验
Non - destructive testing - metallographic replica techniques of surface examination
无损试验.表面检验的金相复制技术
Non - destructive testing ; impression methods for surface examination replica - technique
无损检验.表面检验的压印法复制技术
Standard test method for ultrasonic surface examinations using electromagnetic acoustic transducer techniques
用电磁声换能器技术进行超声表面检验的标准试验方法