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发明名称
Manufacture of metal tubes
摘要
申请公布号
US1938633(A)
申请公布日期
1933.12.12
申请号
US19320620608
申请日期
1932.07.02
申请人
THE PLYKROME CORPORATION
发明人
MASKREY ALFRED E.
分类号
B21C37/14
主分类号
B21C37/14
代理机构
代理人
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地址
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