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...Earphone The 1 mm board thickness 4 layers PCB Board is applied to bluetooth earphone. While the surface treatment of the PCB Board is ENIG with blue solder mask. Also, the line width and spcaing of this PCB Circuit Board are both 0.1 mm, and the minimum aperture is 0.25 mm. Technical Data Item Details Max layer count 20 L Max board thickness 6.0 mm...
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