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发明名称
Tie plate
摘要
申请公布号
US1836713(A)
申请公布日期
1931.12.15
申请号
US19300439044
申请日期
1930.03.26
申请人
HEWITT WILLIAM B
发明人
HEWITT WILLIAM B.
分类号
E01B9/30;E01B9/40
主分类号
E01B9/30
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代理人
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