Malingaliro a kampani Dashan FASTENER CO., LTD.NDI A LARGE FASTENER PRODUCTION GROUP, omwe ali ndi zokambirana zingapo zopanga.Zinthuzi zimatha kupanga zinthu wamba zazitsulo za kaboni kapena zitsulo zosapanga dzimbiri.Zogulitsa za nangula zimaphatikizapo gecko yokonza magalimoto, ma bolt a nangula amankhwala, mabawuti okulitsa, mabawuti a implosion ndi zina zotero.Zogulitsa za kampaniyo ndi China Construction Group, China Railway Group, China Metallurgical Group, China Communications Group, China Coal Group yachita mgwirizano wozama.