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经营范围
发明名称
UNDERFRAMES FOR LONGWALL MINERAL MINING MACHINES
摘要
申请公布号
GB1301006(A)
申请公布日期
1972.12.29
申请号
GB19700034829
申请日期
1970.07.17
申请人
COAL INDUSTRY (PATENTS) LIMITED
发明人
JAMES MALCOLM AGNEW
分类号
E21C35/22
主分类号
E21C35/22
代理机构
代理人
主权项
地址
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