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经营范围
发明名称
Tubular pit props, piles, arched roof supports and the like
摘要
申请公布号
GB367218(A)
申请公布日期
1932.02.18
申请号
GB19310009337
申请日期
1931.03.27
申请人
BROMFORD TUBE COMPANY LIMITED;REGINALD WILLIAM SPENCER
发明人
分类号
E21D15/02
主分类号
E21D15/02
代理机构
代理人
主权项
地址
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