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发明名称
DEVICE FOR DRILLING SQUARE HOLES
摘要
申请公布号
GB8922744(D0)
申请公布日期
1989.11.22
申请号
GB19890022744
申请日期
1989.10.10
申请人
BUCK, MICHAEL
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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