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发明名称
HOLE CLEANING DEVICE
摘要
申请公布号
CA633017(A)
申请公布日期
1961.12.19
申请号
CAD633017
申请日期
申请人
INGERSOLL-RAND COMPANY
发明人
EWALD H. KURT
分类号
主分类号
代理机构
代理人
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地址
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