1.High ingancin fenti, ta yin amfani da babban zafin jiki, acid mai karfi, phosphating, putty, spraying da sauran matakai masu tsatsa, don tabbatar da cewa kowane samfurin zai iya tsayayya da yashwar ruwan sama. cinyewa, mafi muni.3.Tsaro da sata, kawai tare da ...
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