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发明名称
ROTARY PERCUSSIVE DRILL CONTROL
摘要
申请公布号
US3547205(A)
申请公布日期
1970.12.15
申请号
USD3547205
申请日期
1968.06.20
申请人
WESTINGHOUSE AIR BRAKE CO.
发明人
JOHN L. NAGELY
分类号
B25D9/12;E21B19/084;(IPC1-7):B25D9/04
主分类号
B25D9/12
代理机构
代理人
主权项
地址
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