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发明名称
Advancing roof support systems
摘要
申请公布号
GB1029301(A)
申请公布日期
1966.05.11
申请号
GB19620000433
申请日期
1962.01.04
申请人
COAL INDUSTRY (PATENTS) LIMITED
发明人
KIBBLE JOHN DUNBAR;TEALE RONALD
分类号
E21D23/00
主分类号
E21D23/00
代理机构
代理人
主权项
地址
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