PCB工程常用英语（公差方面的表达）

1. XXX.的尺寸公差为+/-0.005，这要求是太紧对我们生产，建议公差放松到+/-0.008"。
  The tolerance of dimension  is specified XXX.+/-0.005" .It is tight for our  
production .We suggest +/-0.008" instead。  
2.在*.pdf文件中要求外形公差为+/-0.005"，建议按IPC 二+/-0.01"
代替。   
The profile tolerance is specified +/-0.005" in *.pdf file. We suggest as per IPC class 2，that is to say, it is +/-0.01".   
3. 在叠层图中要求板厚公差为+/-0.007"，而notes 1中要求板厚公差为+/-0.005"，他们是不同的，建议0.062"+/-0.007"是可接受的，因为+/-0.005"对我们来说太难控制了。
The tolerance of the board thickness is specified +/-0.007" in layup detail which is different form NOTES 1  
+/-0.005".We suggest 0.062"+/-0.007" is acceptable for +/-0.005" is very tough for us to control.  



4.外形公差要求+/-0.1mm，这超出了我们生产，建议按+/-0.2mm
控制。   
The tolerance of the outline is specified +/-0.1mm.It's above us. We suggest  +/-0.2mm instead.   
5. v-cut留厚公差为+/-0.06mm上下偏移公差为+/-0.05mm，这两个公差都太紧，
建议两个公差都按+/-0.1mm控制。
The remain tolerance of v-cut is specified +/-0.06mm and offset tolerance  
is +/-0.05mm. they are too tight for us,we suggest both tolerance are +/-0.1mm  
instead.   
6.孔位公差为0.05mm，这是太紧对我们，建议用+/-0.076mm替代。
  The tolerance of the hole position is specified 0.05mm. It's too tight for us, We suggest +/-0.076mm instead.   
7. 角度公差为+/-0.5mm，这是太紧对我们，v-cut角度我们将控制在30+/-5
度。
The tolerance of angle is +/-0.5 degree ,it is tight for us , we would  
like to control the angle of v-cut within 30+/-5 degree.  
8.在1MB5476-01.pdf文件中要求孔到板中心的公差是+/-0.05mm，这是太紧对我
们，建议安IPC二级。
  It is special that the tolerance of the hole to board center is  
+/-0.05mm in the 1MB5476-01.pdf file,it is too tight for us ,we suggest as per IPC class 2 .  
9.要求线宽和线间距公差为+/-0.03，这是太紧对我们，请确认放松到+/-20%。  
It stated that conductor width and spacing shall be within +/-0.03(0.001)  
of gerber data , it is tight for us , we would like to relax to +/-20%.Pls confirm.   
10.Φ3.0的孔径公差要求+0.05mm，这太紧对我们，请确认放松到+0.1/-0mm。  
The tolerance of the holes with diameter 3.0mm is required to control
within +0.05mm ,it is tight for us , we would like to relax to +0.1/-0mm.Pls confirm.  

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啥东西？看不懂，专业制作磨具的吧？