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发明名称
Tamping device
摘要
申请公布号
US2353990(A)
申请公布日期
1944.07.18
申请号
US19430506121
申请日期
1943.10.13
申请人
ARTHUR BLAIR TOM
发明人
BLAIR TOM ARTHUR
分类号
E01B27/18
主分类号
E01B27/18
代理机构
代理人
主权项
地址
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