Chifukwa chakukula kwamphamvu kwamphamvu zokhazikika komanso zoyera, njira zosungiramo mphamvu zapakhomo zikuchulukirachulukira.Imakwaniritsa zosowa zosiyanasiyana za anthu pakupulumutsa mphamvu, kupulumutsa mtengo, komanso kugwiritsa ntchito magetsi mosasunthika.Nthawi zambiri, makina osungira mphamvu zapakhomo amakhala ndi magawo atatu ...
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