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发明名称
Improvements in or relating to pit props and like supports
摘要
申请公布号
GB701449(A)
申请公布日期
1953.12.23
申请号
GB19500028542
申请日期
1950.11.22
申请人
LAKE & ELLIOT LIMITED;GEORGE GILBERT;JOHN NEWMAN
发明人
分类号
E21D15/52
主分类号
E21D15/52
代理机构
代理人
主权项
地址
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