... 通带指标 passband specification 通导孔 access hole 通道（式）电子倍增器 channel electron multiplier ...
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是否通过切片检验pth与小导通孔孔壁状况，并有相应的改善对策跟踪？
Is PTH and small via hole wall quality checked by cross-section and followed by a closed loop corrective action?
网印：在板两面完全涂覆阻焊油墨，包括导通孔、焊盘。
Screen Print: Solder mask coating will cover completely the panel holes, pads and traces, on both sides.
此研究对高速数字设计者深入理解导通孔设计有一定意义。
The study allows high-speed digital designers to have a more indepth assessment of via design.
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