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68 - Flank Angle B (bot at 1.0 length)
This is the angle the lower weld toe makes with a point 1.0mm from the toe of the weld. This measurement is different than Undercut Toe B.
Flank Angle B (bot at 1.0 length) Pic0
Flank Angle B (bot at 1.0 length) Pic1