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经营范围
发明名称
Improvements in and relating to withdrawal devices for hydraulic pit props
摘要
申请公布号
GB1060483(A)
申请公布日期
1967.03.01
申请号
GB19620032082
申请日期
1962.08.21
申请人
ACROW (ENGINEERS) LIMITED
发明人
REYNOLDS REGINALD
分类号
E21D15/60
主分类号
E21D15/60
代理机构
代理人
主权项
地址
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