AS B72-1940
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
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11-08-2017
01-01-1940
Applies to toolmakers' straightedges of short length, intended for very accurate work, and having one working edge, which is bevelled and very slightly rounded off (commonly described as a 'knife-edge').
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