焰源 meaning in English

flame source

Plastics - determination of burning behaviour of thin flexible vertical specimens in contact with a small - flame ignition source
塑料.与小火焰源接触的薄型垂直软样件的燃烧性能的测定
Plastics - determination of burning behaviour of thin flexible vertical specimens in contact with a small - flame ignition source - amendment 1 : specimens
塑料.立式软薄试样与小火焰源接触的燃烧性能测定.修改件1 :样品