Makina a konkrite ndi zosemphana ndi makinawo, chifukwa chake ayenera kusamalidwa bwino kuti achepetse. Kukonza kwa nkhunguwu ndikosavuta. Ngati mungatsatire njira zoyenera izi, nkhunguyo sikhala nthawi yayitali.
Kukula kwa nkhungu / nkhungu kwa konkriti ndi chimodzi mwazofunikira kuti makinawo azichita. Chifukwa cha ntchito yake pafupipafupi, itha zaka mutagwira ntchito kwa nthawi yayitali. Makamaka.
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