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发明名称
Method of installing valve port liners
摘要
申请公布号
US2340566(A)
申请公布日期
1944.02.01
申请号
US19410414163
申请日期
1941.10.08
申请人
UNITED AIRCRAFT CORPORATION
发明人
RYDER EARLE A.
分类号
B21D49/00
主分类号
B21D49/00
代理机构
代理人
主权项
地址
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