Then, the divide standard of damage grade and the enduring fire limit time of the tunnel lining caused by fire accident are discussed.
在此基础上提出了隧道衬砌火灾损伤等级的划分标准与耐火极限时间。
The coatings film will be dilatated when contacted to fire, forming a high dense and micro-porous fire proofing layer to prolong the fire retardant limit of steel structures.
由该涂料制得的涂层遇火发泡膨胀，形成具有一定厚度的密实微孔状阻燃层，从而提高了钢结构的耐火极限。
The experiment also shows that the use of different nano materials and quantities has a certain impact on the fire resistant limit of the steel structural fireproof dope.
实验还表明，不同的纳米材料及其加入量对钢结构防火涂料的耐火极限均有不同程度的影响。
Mine fire is one of five big disasters in coal mine. The problem of probing underground fire source's position and limit is still an opening task in our country.
矿井火灾是煤矿五大灾害之一，探测地下火源位置的问题在我国仍然是一项开放性的课题。
When vapors of flammable liquid or combustible gas stagnate in job site , reaching 30% or more of the lower explosion limit, dangers such as explosion and fire may occur imminently;
四于作业场所有引火性液体之蒸气或可燃性气体滞留，达爆炸下限值之百分之三十以上，致有立即发生爆炸、火灾危险之虞时。
When vapors of flammable liquid or combustible gas stagnate in job site , reaching 30% or more of the lower explosion limit, dangers such as explosion and fire may occur imminently;
四于作业场所有引火性液体之蒸气或可燃性气体滞留，达爆炸下限值之百分之三十以上，致有立即发生爆炸、火灾危险之虞时。
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