Me ka hoʻomohala ʻana o ka ʻepekema a me ka ʻenehana hou, ʻo ka ʻoihana kila e like me ka "skeleton" o ka ʻoihana honua, ua lilo kona kūlana i mea nui a ʻoi aku ka nui, a ʻoi aku ka paʻakikī o nā koi o ke kila, ʻo ia kekahi o nā ala kūpono e hoʻomaikaʻi ai i ka ka maikaʻi o ke kila carburization desulfurization, seamless calcium Seamless Solid Calcium Cored Wire i loko o kahi mea nui loa.