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发明名称
Manufacture of tubes and particularly tubes for heat transference devices
摘要
申请公布号
US1951568(A)
申请公布日期
1934.03.20
申请号
US19300462094
申请日期
1930.06.18
申请人
JOSEPH STILL WILLIAM
发明人
STILL WILLIAM JOSEPH
分类号
B21C37/26
主分类号
B21C37/26
代理机构
代理人
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