BeagleBoard is supported by a large community and its design documents, including architecture drawings of the printed circuit board (PCB) for use in manufacturing, are freely available for download.
BeagleBoard受一个规模很大的社区支持，而它的设计文档，包括生产用的印刷电路板(PCB)的架构草图，均可免费下载得到。
Low surface insulation resistance (SIR) of a printed circuit board (PCB) can degrade the performance of the circuits on the board considerably.
印制电路板的表面绝缘电阻(SIR)低会大大降低电路板的电路性能。
With the development of Printed Circuit Board (PCB), liquid photo imageable etching resist ink has become the prime process technology of the fine line graph facture.
随着印制电路板(PCB)行业的飞速发展，液态光致抗蚀油墨已逐渐成为精细导线图形制作的主要方法。
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