A.GB/T3956-2008 B.GB/T5013.2-2008 C.GB/T2951.11-2008 D.GB/T5023.1-2008
A.1.5m B.1.8m C.2.5m D.1.0m
A.0.90mm,0.75mm B.0.80mm,0.70mm C.0.85mm,0.75mm D.0.90mm,0.70mm