GB/T 18380.34-2022电缆和光缆在火焰条件下的燃烧试验第34部分:垂直安装的成束电线电缆火焰垂直蔓延试验 B类国家标准
英文:Tests on electric and optical fibre cables under fire conditions—Part 34:Test for vertical flame spread of vertically...
英文:Tests on electric and optical fibre cables under fire conditions—Part 34:Test for vertical flame spread of vertically...