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发明名称
Multiply tubing
摘要
申请公布号
US2241644(A)
申请公布日期
1941.05.13
申请号
US19390294112
申请日期
1939.09.09
申请人
GENERAL MOTORS CORPORATION
发明人
NICHOLS CHARLES A.;BISH RAYMOND H.
分类号
B21C37/15
主分类号
B21C37/15
代理机构
代理人
主权项
地址
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