Pono nā kī ʻelua poʻo i ka mālama ʻana i ka ʻili, a he nui nā ʻano o ka mālama ʻana i ka ʻili no nā bolts, me ka electroplating, blackening, oxidation, phosphating, a me ka non electrolytic zinc sheet coating treatment. Eia nō naʻe, ʻo ka ʻāina maʻamau GB901 pālua poʻo bolt factory's home appliance plated fasteners account no ka hapa nui i ka hoʻohana maoli ʻana i nā mea hoʻopili.