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发明名称
Method and apparatus for predetermining gate systems
摘要
申请公布号
US2699002(A)
申请公布日期
1955.01.11
申请号
US19490090663
申请日期
1949.04.30
申请人
DI SYLVESTRO GEORGE
发明人
SYLVESTRO GEORGE DI
分类号
B22C9/08
主分类号
B22C9/08
代理机构
代理人
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地址
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