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
Mafala Akutoma Nawo Makina Otsekeredwa Makina Osiyanasiyana a Block ndi gawo limodzi pantchito yomanga, kuyimira makina ofunikira pakupanga ma concrete - magawo oyambira omwe amagwiritsidwa ntchito pomanga zomanga.
Kampaniyo nthawi zonse imapereka chidwi ku nyumba zamsika. Amagogomeza kuphatikiza kwangwiro kwa ukatswiri ndi ntchito ndi kutipatsa zinthu ndi ntchito zomwe sitingathe.