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发明名称
Improvements in coal cutting or hewing machines
摘要
申请公布号
GB889821(A)
申请公布日期
1962.02.21
申请号
GB19600019343
申请日期
1960.06.01
申请人
SOCIETE D'APPLICATIONS GENERALES D'ELECTRICITE ET DE MECANIQUE S.A.G.E.M.
发明人
分类号
E21C25/10
主分类号
E21C25/10
代理机构
代理人
主权项
地址
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