self-combustible造句

• B and the self - combustible temperature shall not be lower than t4 . installed in a place of dangerous gas of area
  B组，自然温度不低于t4 135组别，区或区的
• 2 . the explosion grade of combustible gas in the environment no more than category ii b , the self - combustible
  2环境中可燃性气体或易燃气体的蒸汽爆等级不高于b类。