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发明名称
Pipe pushing machine
摘要
申请公布号
US1974324(A)
申请公布日期
1934.09.18
申请号
US19330695367
申请日期
1933.10.26
申请人
LOREN BAILEY
发明人
BAILEY LOREN
分类号
E21B7/04
主分类号
E21B7/04
代理机构
代理人
主权项
地址
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