单项选择题
A.2-15mm B.3-15mm C.4-15mm D.6-15mm
A.70mm±1mm B.80mm±1mm C.40mm±1mm D.90mm±1mm
A.48.0 B.58.0 C.68.0 D.78.0
A.210.0 B.215.0 C.225.0 D.220.0
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