Valavu ya butterfly yamoto imagwira ntchito pamapaipi a mafuta, mankhwala, chakudya, mankhwala, kupanga mapepala, hydropower, kutumiza, madzi ndi ngalande, smelting, mphamvu ndi machitidwe ena. Itha kugwiritsidwa ntchito ngati zida zowongolera komanso zowongolera pamagesi osiyanasiyana owononga komanso osawononga ...
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