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发明名称
Appareil de support de toit à avancement pour galeries de mines
摘要
申请公布号
FR1395103(A)
申请公布日期
1965.04.09
申请号
FR19640969764
申请日期
1964.04.03
申请人
DOWTY TECHNICAL DEVELOPMENTS LIMITED
发明人
ANDREWS THOMAS DESMOND HUDSON;HARDING JOHN KAMMERER
分类号
E21D23/16
主分类号
E21D23/16
代理机构
代理人
主权项
地址
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