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发明名称
Boisage de galeries de mine au moyen d'éléments de soutènement dont les extrémités sont armées pour recevoir un rondin d'écrasement ou autre élément similaire
摘要
申请公布号
FR754732(A)
申请公布日期
1933.11.13
申请号
FRD754732
申请日期
1933.04.25
申请人
BOCHUMER EISENHUETTE HEINTZMANN & CO G.M.B.H.
发明人
TOUSSAINT HEINRICH
分类号
E21D11/18
主分类号
E21D11/18
代理机构
代理人
主权项
地址
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