backscattering thickness gage
gamma ray thickness gage
isotopic thickness gage
radiation thickness gage
radioactive thickness gage
ultrasonic thickness gage
block gage (gage block) (slip gage)
ratio of erosion thickness and stratigraphic thickness
thickness difference to average thickness
Thickness-control with thickness gauge
tube thickness (=tube-wall thickness)
double gap gage (X-gage)
non-contact gage (air gage)
X-gage (double gap gage)
24 h thickness swelling rate