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发明名称
Adjustable boring head for continuous mining machine
摘要
申请公布号
US3109635(A)
申请公布日期
1963.11.05
申请号
US19600069667
申请日期
1960.11.16
申请人
GOODMAN MANUFACTURING COMPANY
发明人
BERGMANN ERNST R.
分类号
E21C27/22
主分类号
E21C27/22
代理机构
代理人
主权项
地址
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