{TAIL ~ The gauge} also has a pair of rest bars mounted on the base plate to support the brake block at {HEAD ~ the specified radius} at first and second measuring points 
{ TAIL ~ The gauge } also has a pair of rest bars mounted on the base plate to support the brake block at { HEAD ~ the specified radius } at first and second measuring points
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH