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发明名称
Screw down
摘要
申请公布号
US1776444(A)
申请公布日期
1930.09.23
申请号
US19270161387
申请日期
1927.01.15
申请人
UNITED ENGINEERING AND FOUNDRY COMPANY
发明人
MCBANE WALTER W.;KLEIN CLARENCE J.
分类号
B21B31/24
主分类号
B21B31/24
代理机构
代理人
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