单项选择题
A.≥30张 B.≤30张 C.<30张
A.≤0.5mm B.≤0.2mm C.≤0.1mm
A.±0.4mm,±0.3mm B.±0.3mm,±0.4mm C.±0.2mm,±0.3mm D.±0.3mm,±0.2mm
A.≤0.2MM B.≤0.5MM C.≤1.0MM D.≤1.5MM
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