toxicity hazard zone 毒性危害区 ; 毒性风险区
hazard zone mapping 危险区制图
gas hazard zone 瓦斯灾害危险区
seismic hazard zone 地震危险区
hazard zone planning 危险地带规划
hazard zone avoidance 避开危险地带
forest fire hazard zone 重点火险区
Combined with coal characteristics in goaf of fully mechanized top-coal caving, determinant criteria and methods of hazard zone in goaf are determined by theory of coal spontaneous combustion zone.
本论文结合综放面采空区浮煤自然发火的特点，运用煤自燃危险区域判定理论，确定了采空区自燃危险区域的判定条件和方法步骤。
Poisonous liquid, which in contact with water emits flammable gases, n. O. S. (Inhalation Hazard Zone a).
有毒液体，遇水释放可燃性气体，未作说明(吸入危害带a)。
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