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经营范围
发明名称
Revêtement de puits en particulier pour puits d'extraction de mine
摘要
申请公布号
FR1179811(A)
申请公布日期
1959.05.28
申请号
FRD1179811
申请日期
1957.07.24
申请人
GUTEHOFFNUNGSHUETTE STERKRADE AKTIENGESELLSCHAFT
发明人
分类号
E21D7/00
主分类号
E21D7/00
代理机构
代理人
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地址
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