Diagnostic apparatus, not for medical purposes, for the assessment of the integrity of built physical struc­tures; Monitoring apparatus, electric, namely, apparatus for the monitoring of the integrity of built physical struc­tures; Detectors, namely, elastic waves and vibrations detectors; Sound locating instruments, namely, acoustic emission and guided wave detec­tion and ranging instruments; Material testing instruments and machines, namely, apparatus for material parame­ters extraction...