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  1. #1
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    Jun 2009
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    12

    Unknown dimensioning symbol

    Can anyone tell me what these 2 circles with an upside down 7 mean?
    Click image for larger version. 

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  2. #2
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    Jun 2009
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    12

    Re: Unknown dimensioning symbol

    Answered on another forum. The general consensus is that it is a fancy way to call out the datum

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