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发明名称
IMPROVEMENTS IN POLYPHASIC MATERIALS
摘要
申请公布号
GB9018959(D0)
申请公布日期
1990.10.17
申请号
GB19900018959
申请日期
1990.08.31
申请人
RUSSELL, F M
发明人
分类号
主分类号
代理机构
代理人
主权项
地址
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