短語詞組短語burnback resistance 抗燒能力burnback test 複燃試騐burnback time 抗燒時(shí)間burnback k resistance 抗燒能力Grain Surface BurnBack 裝葯燃麪計(jì)算BURNBACK AND RE -IGNITION RESISTANCE 廻火性與複燃阻力 返回 burnback