flame spread rate meaning in English

火焰蔓延速度
火焰蔓延速率

Textile fabrics . burning behaviour . the 45 test determination of flame spread rate
纺织织物燃烧性能45方向燃烧速率测定
Used for testing horizontal combustibility of various textile and show with flame spread rate
用于测定各类纺织织物水平方向燃烧性能，并以火焰蔓延速率来表示。
Textiles . fire behaviour . measurement of flame spread properties of 45 degrees oriented specimens . determination of flame spread rate
纺织品.燃烧性能.度定向试样火焰蔓延特性的测定.火焰蔓延速度的测定