Detection and monitoring equipment Steel guardrail column buried deep impact elastic wave detector EDMA-I Prestressed concrete beam multi-function detector SPC-MATS Falling ball rebound modulus tester SFB-RMT Hole filling quality tester SBA-HTF Concrete multifunctional non-destructive tester SCE-MATS Anchor quality detector SRB-MATS TAM-4000 underground pipeline detector Advance Prediction of TSP305 Tunnel Steel bar dynamometer