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发明名称
Improvements in the production of malleable metal pipes
摘要
申请公布号
GB316571(A)
申请公布日期
1930.04.24
申请号
GB19290015321
申请日期
1929.05.16
申请人
EDWARD WEIR
发明人
分类号
B21C37/14
主分类号
B21C37/14
代理机构
代理人
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