单项选择题
A. Pad to line B. Line to Line C. PTH to surface D. PTH to circuit
A. File->attributes->change B. File->attributes->delete C. File->locks->check in D. File->locks->check out
A.孔边到孔边的最小距离 B.孔中心到孔中心的最小距离 C.孔边到孔边的最大距离 D.孔中心到孔中心的最大距离