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1994 The GD&T Hierarchy Pocket Guide (Y14.5-1994)

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GD&T (Geometric Dimensioning &Tolerancing) - ppt download

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GD&T Tip - Position - Boundary Control - Tolerances modified at LMC and MMC are a Single Limit

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2009 The GD&T Hierarchy Pocket Guide (Y14.5-2009)