量子测量中精度的标准极限，源于与可计数离散粒子，而不是连续量相关的统计误差。
The standard limit on the precision with which a quantum measurement can be carried out is due to the statistical error associated with counting discrete particles rather than continuous quantities.
另外，在齿轮CAD系统中还设计了齿廓误差计算、齿轮测绘及齿轮国家标准查询等一些具有较大实用价值的模块。
In addition, the CAD system includes some more utility modules, such as module of gear calculation of error of gear profile, module of gear measurement, module of looking up nation standard of gear.
标准中给出了1级和2级精密度和准确度的最大允许值，误差的图解说明具体见标准。
Standard grade 1 and grade 2 is given in the precision and accuracy of maximum allowable values, see diagram to explain the specific standard error.
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