The flaws like internal cracks etc. in the metal blocks are detected by using |
|||||||
(a) |
reverberation |
(b) |
ultrasound |
(c) |
infrasound |
(d) |
The flaws like internal cracks etc. in the metal blocks are detected by using |
|||||||
(a) |
reverberation |
(b) |
ultrasound |
(c) |
infrasound |
(d) |