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Yokoyama Ryuzo | 論文著者
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Yokoyama Ryuzo
Central Office Switching Systems Division Oki Electric Industry Co. Ltd.
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YOKOYAMA Ryuzo
Central Office Switching Systems Division, Oki Electric Industry Co., Ltd.
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Yokoyama Ryuzo
Faculty Of Engineering Iwate University
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Yokoyama Ryuzo
Faculty of Engineering, Iwate University