A.1級;3.48 B.1級;6.458 C.2級;4.568 D.2級;6.9547
A.6.2—12.3 B.6.5—12.5 C.6.5---12.3 D.6.5—12.7
A.1-3mm B.≥3mm C.>2mm D.<1.5mm