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发明名称
Perfectionnement aux étais hydrauliques pour mines
摘要
申请公布号
FR1155671(A)
申请公布日期
1958.05.07
申请号
FRD1155671
申请日期
1956.07.20
申请人
DOWTY MINING EQUIPMENT LIMITED
发明人
分类号
E21D15/44
主分类号
E21D15/44
代理机构
代理人
主权项
地址
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