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发明名称
Improvements connected with the construction of tubular poles
摘要
申请公布号
GB629078(A)
申请公布日期
1949.09.09
申请号
GB19470028821
申请日期
1947.10.29
申请人
CYRIL HARCOURT MATTHEWS
发明人
分类号
B21C37/10;B21C37/15;E04H12/08
主分类号
B21C37/10
代理机构
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