Tec-Ease, Inc. provides the most comprehensive GD&T training and coaching in the industry. Our GD&T courses are designed to keep the participant interested and engaged, while having fun.
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Here is a little test that one of our faithful readers asked me to create. He tells me that 9 out of 10 folks at his work get it wrong. Given the drawing, does figure A or B more correctly illustrate the datum reference framework which establishes an origin of measurement for the profile tolerance and the position callout on the two holes?