Chiyambi: Pankhani ya mapaipi, kutentha, ndi kuziziritsa, mapaipi amkuwa akhala akudziwika nthawi zonse chifukwa cha kutenthetsa kwawo ndi magetsi, kukana kwa dzimbiri, mphamvu, ductility, ndi kukana kutentha kwakukulu. Kuyambira zaka 10,000 zapitazo, anthu ...
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