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经营范围
发明名称
étançon de mine perfectionné
摘要
申请公布号
FR1067744(A)
申请公布日期
1954.06.17
申请号
FRD1067744
申请日期
1952.12.16
申请人
发明人
HANDLEY JOHN;BROWNE JACK NIXON
分类号
E21D15/46
主分类号
E21D15/46
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代理人
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