Mau oyamba a Cement and Block-Making BasicsCement ndi cholumikizira chofunikira kwambiri pakumanga, chofunikira popanga zolimba, kuphatikiza midadada ya konkriti. Kufunika kwa simenti mu block-kupanga sikungatheke, chifukwa kumatsimikizira mphamvu
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?