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
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