Pono e hana ʻia nā metala he nui a me kā lākou pūhui i nā kiʻiʻoniʻoni lahilahi ma mua o ka hiki ke hoʻohana ʻia i nā huahana ʻenehana e like me ka uila, hōʻike, nā wahie, a me nā noi catalytic.Eia naʻe, nā metala "kūʻokoʻa", me nā mea e like me ka platinum, iridium, ruth ...
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