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发明名称
Revêtement constitué par des éléments annulaires de cuvelage pour puits de mines, trous de forage et autres cavités creuses de l'industrie minière
摘要
申请公布号
FR1097174(A)
申请公布日期
1955.06.30
申请号
FRD1097174
申请日期
1954.03.25
申请人
AKTIENGESELLSCHAFT FUER UNTERNEHMUNGEN DER EISEN- UND STAHLINDUSTRIE
发明人
分类号
E21D5/10
主分类号
E21D5/10
代理机构
代理人
主权项
地址
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