单项选择题
分析防焊层资料时,查看open孔clearance,查看下面哪项()
A. SM slivers
B. Pad Annular Ring
C. coverage
D. PTH Annular Ring
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单项选择题
A. SM slivers
B. Pad Annular Ring
C. coverage
D. PTH Annular Ring
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