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发明名称
Improvements in the manufacture of multi-ply tubing
摘要
申请公布号
GB502200(A)
申请公布日期
1939.03.14
申请号
GB19370029606
申请日期
1937.10.29
申请人
GENERAL MOTORS CORPORATION
发明人
分类号
B21C37/10
主分类号
B21C37/10
代理机构
代理人
主权项
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