Zikafika pamayankho osungiramo mafakitale, mashelufu a rivet amawoneka bwino chifukwa cha kusinthasintha kwake, kusanjika kosavuta, komanso kutsika mtengo. Mu bukhuli, tifufuza zofunikira za mashelufu a rivet, maubwino ake, ndi momwe angagwiritsire ntchito pamitundu yosiyanasiyana ...
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