Zida zamakina a block zimakhala ndi kuthekera kwakukulu ku China. Kupambana kokhala Wopanga Makina Opangira Block kumadalira kukhwima kwaukadaulo, mtundu wa zida zamakina a block, kupambana kwa ogwira ntchito, komanso kutsata nzeru.
Mipiringidzo ya konkriti yatuluka ngati yofunika kwambiri pantchito yomanga, motsogozedwa ndi kulimba kwake, mtengo-mwachangu, komanso kusinthasintha. Pamene kukula kwa mizinda kukuchulukirachulukira komanso chitukuko cha zomangamanga
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?