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发明名称
Machine améliorée pour l'extraction du charbon et d'autres minéraux
摘要
申请公布号
FR1125676(A)
申请公布日期
1956.11.05
申请号
FRD1125676
申请日期
1955.06.01
申请人
MAVOR & COULSON LTD
发明人
JACKSON DAVID
分类号
E21C27/04
主分类号
E21C27/04
代理机构
代理人
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地址
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