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发明名称
Haulage system for mines
摘要
申请公布号
US1773087(A)
申请公布日期
1930.08.12
申请号
US19250029832
申请日期
1925.05.12
申请人
THE JEFFREY MANUFACTURING COMPANY
发明人
LEVIN NILS D.
分类号
B61C3/00
主分类号
B61C3/00
代理机构
代理人
主权项
地址
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