Mau oyamba a Concrete Blocks Concrete midadada, yomwe imadziwika kuti konkriti masonry units (CMUs), ndi zida zomangira zomwe zimagwiritsidwa ntchito pomanga makoma ndi zinthu zina. Amadziwika chifukwa cha kukhalitsa, mphamvu, ndi zosiyanasiyana
Njerwa ndi zida zomangira zodziwika bwino, ndipo zimagwiritsidwa ntchito kwambiri m'magawo ambiri. Monga imodzi mwa mafupa omanga, kufunikira kwa njerwa kukukulirakulira pang'onopang'ono. Inde, njirayi ndi yosasiyanitsidwa ndi kugwiritsa ntchito makina opangira njerwa. Ndi ver