ʻO ke one keramika i loaʻa hou ka nānā ʻana i nā makahiki i hala iho nei, ʻo ia ka zirconium oxide beads (composition: ZrO₂56% -70%, SIO₂23% -25%), he spherical, maʻemaʻe ka ʻili me ka ʻole e hōʻino i ka mea hana, paʻakikī kiʻekiʻe, elasticity maikaʻi a me nā multi- ka hoʻi hou ʻana o nā ʻāpana one i ka wā o ka puhi ʻana i ke one, kahi...
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