GB/T 18380.31-2022电缆和光缆在火焰条件下的燃烧试验第31部分:垂直安装的成束电线电缆火焰垂直蔓延试验 试验装置标准
英文:Tests on electric and optical fibre cables under fire conditions—Part 31: Test for vertical flame spread of verticall...
英文:Tests on electric and optical fibre cables under fire conditions—Part 31: Test for vertical flame spread of verticall...