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JP2002068755A
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Method of producing optical element
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Polyhydrazide having phenoxaphosphine ring and preparation thereof
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2,8-bishydrozinocarbonyl-10-phenylphenoxaphosphine-10-oxide
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Polyoxadiazole having phenoxaphosphine ring and preparation thereof
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Polyester having phenoxaphosphine ring and production thereof
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(tetracarboxyl-10-phenylphenoxaphosphine-10-oxide) dianhydride and its preparation
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Polyamide containing phenoxaphosphine ring
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Phenoxaphosphine-ring compound and its preparation
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