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发明名称
Cuttings conveying mechanism
摘要
申请公布号
US2448057(A)
申请公布日期
1948.08.31
申请号
US19430505609
申请日期
1943.10.09
申请人
JOY MANUFACTURING COMPANY
发明人
SIMMONS LEON E.
分类号
E21C35/20
主分类号
E21C35/20
代理机构
代理人
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地址
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