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发明名称
METHOD AND APPARATUS FOR FORMING SECTIONAL SPIRAL FLIGHTS
摘要
申请公布号
US3485116(A)
申请公布日期
1969.12.23
申请号
USD3485116
申请日期
1967.04.24
申请人
TRACY T. FENDER
发明人
TRACY T. FENDER
分类号
B21C37/26;(IPC1-7):B21K5/02;B21D1/04;B23P15/00
主分类号
B21C37/26
代理机构
代理人
主权项
地址
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