In dimensioning a drawing, the Numbers placed in the dimension lines represent dimension that are only approximate and do not represent any degree of accuracy unless so stated by the designer.
在图纸标注尺寸时，除非设计者有意标明，注在尺寸线上的数字代表的尺寸仅仅是近似的，并不代表任何精度等级。
Is mechanical dimension PCB specification (Fab drawing) available at inspection station under document control?
PC B机械尺寸规格是否按照文件要求在检验站进行管控？
A dimension specified for a given feature on one level of drawing, (for example, a detail drawing) is not mandatory for that feature at any other level (for example, an assembly drawing).
一个图纸层面上的给定部品的尺寸(比如，细部图)并不能强制地标注在另外一个层面的图纸上(比如说，装配图)。
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