单项选择题
A.-5 B.-10 C.-15 D.-20
A.1/500 B.1/550 C.1/600 D.650
A.Φ48.0×3.0mm B.Φ48.0×3.5mm C.Φ48.3×3.4mm D.Φ48.3×3.6mm
A.2 B.3 C.4 D.5
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