coal spontaneous combustion fire

• 煤自燃发火

coal spontaneous combustion fire的用法和样例：

例句

1. The self-igniting characteristic of ore and the fire extinguishing method that uses watery grout in Tongshan Copper Mine are presented.
   介绍了铜山铜矿矿石自燃发火特征及用稀水泥浆阻燃灭火的方法。