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发明名称
Sheathed tube and apparatus and method of production thereof
摘要
申请公布号
US2900315(A)
申请公布日期
1959.08.18
申请号
US19520326035
申请日期
1952.12.15
申请人
OHLINGER LEO A
发明人
OHLINGER LEO A.
分类号
B21C37/15;B23K20/02;G21C3/04;G21C21/02
主分类号
B21C37/15
代理机构
代理人
主权项
地址
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