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发明名称
étançon pour mines actionné par un liquide sous pression
摘要
申请公布号
FR1451781(A)
申请公布日期
1966.01.07
申请号
FR19650036353
申请日期
1965.10.27
申请人
DOWTY MINING EQUIPMENT LIMITED
发明人
分类号
E21D15/51
主分类号
E21D15/51
代理机构
代理人
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