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发明名称
AN IMPROVEMENT IN TOOTHEDGED SPADES
摘要
申请公布号
GB8927752(D0)
申请公布日期
1990.02.07
申请号
GB19890027752
申请日期
1989.12.07
申请人
RELGOLD LTD
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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