A gauging device for measuring the accuracy of the rate of {HEAD ~ taper} of {TAIL ~ a tapered, arcuate brake block} at a first measuring point and a second measuring point comprising: 
of
A gauging device for measuring the accuracy of the rate of { HEAD ~ taper } of { TAIL ~ a tapered , arcuate brake block } at a first measuring point and a second measuring point comprising :
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH