Tare da haɓaka kasuwar kasusuwa, binciken kayan da aka dasa shi ma yana ƙara jawo hankalin mutane. Dangane da gabatarwar Yao Zhixiu, kayan ƙarfe na yau da kullun yawanci sun haɗa da bakin karfe, titanium da titanium gami, tushen cobalt ...
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