Weld chitoliro kuwotcherera porosity zimakhudza osati makulidwe mapaipi, chifukwa payipi kutayikira ndi dzimbiri adzakhala ananyengerera mfundo kwambiri kuchepetsa kuwotcherera mphamvu ndi kulimba.Zinthu kuwotcherera porosity ndi: kutuluka m'madzi, dothi, okusayidi ndi chitsulo filings, kuwotcherera zosakaniza ndi makulidwe chivundikirocho ...
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