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。
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.
针对目前VCM磁钢片轮廓尺寸的检测方法存在检测速度慢、精度低等问题，设计了基于机器视觉的VCM磁钢检测系统的总体结构。
The structure of inspection system on VCM based on machine vision is designed to meet the problems of dimensional inspection methods on VCM at present such as low speed, low grade precision and so on.
塑料的成型收缩率直接关系到制品的形状和尺寸精度，因此在塑料注射成型的模具设计中，迫切需要预测制品的成型收缩率。
The shrinkage of plastic products is a very important parameter and need to be forecast during the design of injection molds, which affects the shape and size precision of the products.
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