GB/T 2951.9-1997
General test methods for insulating and sheathing materials of electric cables — Part 4: Specific test methods for polyethylene and polypropylene compounds — Section 2: Elongation at break after pre-conditioning — Wrapping test after pre-conditioning — Wrapping test after thermal ageing in air — Measurement of mass increase
电缆绝缘和护套材料通用试验方法 第四部分:聚乙烯和聚丙烯混合料专用试验方法 第二节:预处理后断裂伸长率试验-预处理后卷绕试验-空气热老化后的卷绕试验-测定质量的增加