肉眼观察的 meaning in English

macroscopic

The present research subject applies supersonic and pressure sensitive techniques of the nondestructive inspection technology in the tensile test of the samples , replacing the old manual operation , manual measurement and naked - eye inspection
本课题在无损探测技术中选择超声技术和压力传感器应用到试验试件拉伸检测中，取代人工操作、手工测量、肉眼观察的落后方法。