栏垂直的公差极限应基于被探测高度的基板点和准确的中线柱的测量。
The limit of tolerance in column plumbness shall be based on the height from the baseplate to the point being plumbed and shall be measured from the true center line of the column.
超差：公差的极限值，通常在外径上发生。
讨论了零件极限尺寸的模糊性，基于模糊集合提出了零件尺寸公差带的模糊数学表征。
The fuzziness in the limiting dimension of the parts is discussed. The fuzzy mathematical expression of the margin tolerance of the parts is proposed based on fuzzy set theory.
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