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发明名称
étançon de mine
摘要
申请公布号
FR801821(A)
申请公布日期
1936.08.19
申请号
FRD801821
申请日期
1936.02.11
申请人
SOCIETE ANONYME DES CHARBONNAGES DE BEERINGEN
发明人
分类号
E21D11/34
主分类号
E21D11/34
代理机构
代理人
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地址
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