ʻO ka pahu pahu metala e pili ana i ka mea i manaʻo ʻia o nā ʻāpana lawe ikaika kiʻekiʻe i hoʻopili ʻia. Eia kekahi, ma ka hoʻololi ʻana i nā mea i makemake ʻia (eg, aluminika, keleawe, stainless steel, titanium, nickel targets, etc.), nā ʻōnaehana kiʻiʻoniʻoni like ʻole (eg, superhard, wear-resistant, anti-corrosi...
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