Njerwa ndi bwino - zomangira zomangamanga, ndipo zimagwiritsidwa ntchito kwambiri m'minda yambiri. Monga limodzi la mafupa omanga, kufunikira kwa njerwa kumakulitsa pang'onopang'ono. Inde, njirayi ndiyosagwirizana ndi kugwiritsa ntchito makina opanga njerwa. Ndi ver
Pali mitundu yambiri yamakina njerwa pamsika, yomwe ili mu makina a njerwa yotchedwa konkrite block. Koma kodi mukudziwa za chizindikiritso cha makina ogona njerwa? Kodi mukudziwa zomwe zilembo za njerwa zikuyimira?
Ndi luso lamphamvu ndi kuthekera kwa ndalama, kasamalidwe ka polojekitiyi, amatipatsa zinthu zomveka, zowoneka bwino kwambiri - Njira zothetsera dongosolo.