Hana ʻia ka huahana: Loaʻa iā ia ke kūpaʻa kiʻekiʻe kiʻekiʻe o ka wela, ke kūpaʻa haʻalulu maikaʻi loa, ka pale ʻana i ka ʻaʻahu, ke kū ʻana o ka corrosion a me nā ʻano ʻē aʻe. Hoʻohana nui: Hoʻohana nui ʻia i nā wahi hoʻololi o nā kiln rotary sima, nā kapuahi decomposition, ...
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