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发明名称
Rail and tie fastener
摘要
申请公布号
US2250785(A)
申请公布日期
1941.07.29
申请号
US19390304773
申请日期
1939.11.16
申请人
WALTZ WINFIELD S
发明人
WALTZ WINFIELD S.
分类号
E01B9/28;E01B13/02
主分类号
E01B9/28
代理机构
代理人
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地址
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