Pankhani yosankha chikwama cha zida, zinthu zomwe zimapangidwira zimatha kusintha kwambiri. Chisankho chilichonse - pulasitiki, nsalu, chitsulo, kapena aluminiyamu - ili ndi mphamvu zake, koma mutafanizira zosankhazo, aluminiyumu nthawi zonse imatuluka ngati chisankho chabwino kwambiri chokhazikika, chokhazikika ...
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