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发明名称
Perfectionnement à la réalisation des souterrains
摘要
申请公布号
FR1512423(A)
申请公布日期
1968.02.09
申请号
FR19660088542
申请日期
1966.12.22
申请人
发明人
BUFFET PAUL, JEAN, ALBERT
分类号
E21D11/00;E21D11/10
主分类号
E21D11/00
代理机构
代理人
主权项
地址
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