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发明名称
Method of making threaded tubes
摘要
申请公布号
US2104688(A)
申请公布日期
1938.01.04
申请号
US19340746323
申请日期
1934.10.01
申请人
ALVIN L. JOHNSON
发明人
ADELL JOHN A.
分类号
B21K1/56
主分类号
B21K1/56
代理机构
代理人
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