A.0.5m.0.5m B.1m.1m C.1.5m.1.5m D.2m.2m
A.5-10mm.1mm B.6-10mm.2mm C.6-10mm.1.5mm D.6-9mm.2mm
A.小于7MPa B.小于8.5MPa C.小于9.5MPa D.小于9MPa