Yog Gunpowder ib Flammable substance

Qhov yuam kev poob raws li cov qeb ntawm flammable solids, thiab gunpowder yog categorized ua ib explosive tej yam khoom.

Vim yog cov tsim nyog ntawm ib qhib taws rau ignition, gunpowder tsis tsim nyog raws li ib tug flammable khoom ib se.