Hana ʻia ma Kina nā ʻāpana ʻokoʻa o nā mīkini mahiʻai, 65mn a me 30MnB5 mau palau mahiʻai kiʻekiʻe a me nā ʻō, nā ʻō lepo, nā wahi pili lepo e pili ana i ka puna

Hana ʻia nā huahana a pau me ke kila boron kiʻekiʻe, ma hope o ka hana ʻana a me ka hoʻoponopono wela ʻana, e hōʻoia i ka lawa ʻana o ka paʻakikī o ka huahana a me ke kūpaʻa ʻana i ka ʻaʻahu. Hoʻokuʻu ʻia aku nā huahana i Rusia, Lithuania, Sepania a me nā ʻāina ʻē aʻe, ma hope o nā hoʻāʻo mākeke he nui ʻole e nā mea kūʻai aku, ʻo kāna hana pono ka papa mua.