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发明名称
Railway
摘要
申请公布号
US1802445(A)
申请公布日期
1931.04.28
申请号
US19270223356
申请日期
1927.10.01
申请人
SANFORD HUGH W
发明人
SANFORD HUGH W.
分类号
B61D7/30
主分类号
B61D7/30
代理机构
代理人
主权项
地址
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