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2024-02-23 22:38:59

a compound of alumina and a metallic oxide

2024-02-23 22:38:55

a compound of alumina and a metallic oxide

2024-02-23 22:38:52

a compound of alumina and a metallic oxide

2024-02-23 22:38:48

a compound of alumina and a metallic oxide

2024-02-23 22:38:44

any of various forms of aluminum oxide occurring naturally as corundum