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发明名称
Header die for use in making screw blanks for double threaded screws
摘要
申请公布号
US2373878(A)
申请公布日期
1945.04.17
申请号
US19430480019
申请日期
1943.03.22
申请人
NEW PROCESS SCREW CORPORATION
发明人
VELLIER WILLIAM A. DE
分类号
B21K1/44
主分类号
B21K1/44
代理机构
代理人
主权项
地址
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