ʻO nā kaulahao Roller nā mea pono i nā ʻano noiʻi ʻenehana, e hāʻawi ana i kahi ala hilinaʻi o ka hoʻouna ʻana i ka mana mai kahi pahu wili i kekahi. Eia nō naʻe, i loko o nā wahi paʻakikī e like me ka wela wela, ka haʻahaʻa kiʻekiʻe, a i ʻole ka ʻike ʻana i nā mea corrosive, hiki i nā kaulahao roller ...
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