Chitoliro chachitsulo chosapanga dzimbiri ndichabechabe chachifumu, chomwe chimagwiritsidwa ntchito kwambiri pakutumiza mafakitale ma pipi
Makina opanga makina monga mafuta a petroleum, zamankhwala zamankhwala, mankhwala, makampani ogulitsa ndi olemera. Kugwiritsa ntchito kwambiri. Kuumitsa kwa zinthuzo kumafotokozedwa ndi mainchesi ndi osavuta komanso osavuta. Komabe, sizikugwirizana. Komabe, sizikugwirizana ndi zitsulo zolimba kapena zowonda.