◆ JGJ 106-2014 Technical code for testing of building foundation piles ◆ JGJ 106-2014 Technical code for testing of building foundation piles ◆ JTG/F81-01-2004 Technical Specification of Dynamic Pile Tests for Highway Engineering ◆ TB 10218-2019 Technical Specification for testing railway piles ◆ DBJ-15-60-2008 Code for Testing of Building Foundation (Guangdong) ◆ CECS02:2005 Technical specification for detecting strength of concrete by ultrasonic-rebound combined method ◆ CECS02:2000 Technical specification for inspection of concrete defects by ultrasonic method ◆ TB10426-2004 Inspection specification for structure concrete strength of railway engineer ◆ ASTM D 6760 - 16 Standard Test Method for Integrity Testing of Concrete Deep Foundation by Ultrasonic Crosshole Testing | 