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发明名称
Perfectionnements à la construction de puits
摘要
申请公布号
FR1191295(A)
申请公布日期
1959.10.19
申请号
FRD1191295
申请日期
1958.02.12
申请人
AKTIENGESELLSCHAFT FUER UNTERNEHMUNGEN DER EISEN-UND STAHLINDUSTRIE
发明人
分类号
E21D5/11
主分类号
E21D5/11
代理机构
代理人
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