its basic principle is combining uttrasonic distance measuring theory with comprter and comprehensive scientific monitoring technologyto execute quality inspection of large diameter foundation pile hole
其基本原理是将超声波测距理论与计算机及综合科学监测技术相结合，对大直径桩孔进行质量检测
以上为机器翻译结果，长、整句建议使用 人工翻译 。