一般来说，当设计工程师把印刷电路板(Printed Circuit Board)的外观形状决定下来后，接着就应 […]
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长度换算: 1 µm = 39.37 µin 1 µin = 0.0254 µm 1 mil = 25.4 µm 1 mil = 1/1000 in = 1000 µin 1 mm = 39.37 mil
