Kuwongolera pamasamba kumatanthawuza kugwiritsa ntchito miyezo ndi njira zasayansi pokonzekera bwino komanso moyenera, kulinganiza, kuwongolera, kuwongolera ndi kuyesa zinthu zosiyanasiyana zopanga pamalo opangira, kuphatikiza anthu (ogwira ntchito ndi oyang'anira), makina (zida, zida, malo ogwirira ntchito) , zipangizo (raw...
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