
Gauge blocks (a.k.a. gage blocks; Johansson gauges; slip gauges; Jo blocks) - bookofjoe
https://en.wikipedia.org/wiki/Gauge_block
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bookofjoe
Wringing:
[https://en.wikipedia.org/wiki/Gauge_block#Wringing](https://en.wikipedia.org/wiki/Gauge_block#Wringing)

