单项选择题
A.0.05~0.60mm B.0.20~0.30mm C.0.05~0.1mm D.0.35~0.45mm
A.60﹪ B.80﹪ C.90﹪ D.100﹪
A.10mm B.8mm C.15mm D.6mm
A.0.20mm B.0.10mm C.0.15mm D.0.05mm
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