Read the Feature Control Frame to Determine the Origin of Measurement (#211)
(In accordance with Y14.5M-1994 standard)
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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?
