易燃
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易燃材料是那些在泄漏时很容易着火的材料，例如化石燃料或甲烷。与易燃材料接触时，简单的火花，即使是轻微碰撞产生的火花，也足以引发火灾。火灾会伤害生物体，蔓延并对环境造成巨大破坏。
In case of a suspected flammable gas leak, cut all sources of open flame, such as lighters, lanterns, steam engine fireboxes, traction loss sparks, and collisions.