GB/T 18380.31-2022

Tests on electric and optical fibre cables under fire conditions—Part 31: Test for vertical flame spread of vertically-mounted bunched wires or cables—Apparatus

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