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经营范围
发明名称
Spudding mechanism
摘要
申请公布号
GB815340(A)
申请公布日期
1959.06.24
申请号
GB19570000568
申请日期
1957.01.07
申请人
RUSTON-BUCYRUS LIMITED
发明人
分类号
E21B1/02
主分类号
E21B1/02
代理机构
代理人
主权项
地址
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