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发明名称
摘要
申请公布号
SE339448(B)
申请公布日期
1971.10.04
申请号
SE19660007105
申请日期
1966.05.24
申请人
GENERAL DYNAMICS CORP
发明人
WISE B;BOUYOUCOS J
分类号
E21B1/26;B21J7/22;B21J7/24;B25D9/12;E02D7/10;E02D7/18;E21B1/00;E21B1/28;(IPC1-7):B25D9/12
主分类号
E21B1/26
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代理人
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