If liquid oxygen spills on asphalt or other surfaces contaminated with combustibles, do not walk on or roll equipment over the area of the spill. Keep sources of ignition away for 30 minutes after all frost or fog has disappeared.

• 如果液氧溅到沥青或者其它被可燃物污染的表面，不要在上面行走或辗轧设备。远离火源30分钟，直到所有的霜和雾都消失。