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He aha ke ʻano o ka hana ʻana o nā huahana graphite e hiki mai ana?
ʻOiai ka hoʻomaka ʻana o ka ʻenehana hana hohonu o nā huahana graphite ma Kina, ua holomua ka hana hohonu o nā huahana graphite ma Kina i nā makahiki i hala.Ma muli o ka hoʻomaikaʻi ʻana o ka hoʻomaʻemaʻe graphite a me nā ʻano kaomi, ua loaʻa nā ʻano o ka graphite ...Heluhelu hou aku
