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发明名称
Spooling
摘要
申请公布号
US2424021(A)
申请公布日期
1947.07.15
申请号
US19450627365
申请日期
1945.11.08
申请人
JOHN COOK
发明人
COOK JOHN
分类号
B21C47/00;B65H54/42;B65H54/44;B65H65/00;B65H67/056
主分类号
B21C47/00
代理机构
代理人
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