depth master gauge

master gauge

master ring

Multifunctional master gauge

reference master gauge

gauge ring

ring gauge

ring-ring-section

screw ring gauge

spiral ring gauge

spline ring gauge

standard ring gauge

Thread ring gauge

Thread ring-gauge

base-ring and frame-ring

collector ring (slip-ring)

column-ring beam joint with shear ring bars

outside ring in-feed system ring

ring of n×n matrices over ring R