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 kulimba kwawo, mphamvu zawo, komanso zosiyanasiyana
Palinso mitundu yambiri ya makina a njerwa pamsika, pakati pawo pali makina a njerwa otchedwa konkire block machine. Koma kodi mukudziwa zozindikiritsa makina oyika njerwa? Kodi mukudziwa zomwe zilembo za nambala ya njerwa zimayimira?