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发明名称
étançon de mines élastique à plusieurs parties
摘要
申请公布号
FR979545(A)
申请公布日期
1951.04.27
申请号
FRD979545
申请日期
1948.05.04
申请人
发明人
VANWERSCH LUDWIG
分类号
E21D15/40;E21D15/56
主分类号
E21D15/40
代理机构
代理人
主权项
地址
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