GB/T 2951.31-2008
电缆和光缆绝缘和护套材料通用试验方法.第31部分:聚氯乙烯混合料专用试验方法.高温压力试验.抗开裂试验
Common test methods for insulating and sheathing materials of electric and optical cables.Part31:Methods specific to PVC compounds.Pressure test at high temperature.Test for resistance to cracking