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发明名称
Method and machine for making pipe
摘要
申请公布号
US2157988(A)
申请公布日期
1939.05.09
申请号
US19360116264
申请日期
1936.12.17
申请人
THE ANDREWS LEAD COMPANY, INC.
发明人
KNAPP ALFRED P.
分类号
B21C25/00;B21C25/02;B21C26/00
主分类号
B21C25/00
代理机构
代理人
主权项
地址
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