单项选择题
A.405±4mm B.404±2mm C.405±2mm D.404±4mm
A.508.1±4mm B.508.1±2mm C.507.1±4mm D.507.1±2mm
A.189±2mm B.188±4mm C.188±2mm D.187±4mm
A.227.3±4mm B.226.3±5mm C.226.3±4mm D.225.3±5mm
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