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发明名称
Apparatus for mining coal
摘要
申请公布号
US1945744(A)
申请公布日期
1934.02.06
申请号
US19290340431
申请日期
1929.02.16
申请人
THE JEFFREY MANUFACTURING COMPANY
发明人
LEVIN NILS D.
分类号
B65G21/00
主分类号
B65G21/00
代理机构
代理人
主权项
地址
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