Ndi chitukuko cha mafakitale, chitetezo dziko ndi sayansi ndi luso, makamaka chitukuko cha ndege, kupanga magalimoto, nyukiliya, roketi, mizinga, mlengalenga luso, ndi mafakitale kupanga makina, chofunika kupereka chiwerengero chochulukirachulukira mkulu ...
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