nyob rau tej cheeb tsam uas kaw, cawv concentration ranging ntawm 69.8% Thiab 75% yuav ua tau kom tawg.
nonetheless, Nws tseem ceeb heev uas yuav tau nco ntsoov tias cawv, Thaum tsis classified li ib explosive, xwb ib flammable tej yam khoom, Thiab muaj cov taws qhib taws yog kiag li txwv. li no, kev tiv thaiv yog ib qho tseem ceeb heev.