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?
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.
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
Mu makampani omanga mphamvu ya mphamvu, kufunikira kwa okwera - zomangira zomangamanga sizinakhaleponso zambiri. Mwala wanji womwe ukufunidwa ndikugwiritsa ntchito makina a simenti opanga simenti, omwe ndi assensia