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发明名称
摘要
申请公布号
DE3029523(C2)
申请公布日期
1984.11.22
申请号
DE19803029523
申请日期
1980.08.04
申请人
CHRISTENSEN, INC., SALT LAKE CITY, UTAH, US
发明人
JUERGENS, RAINER, DR.-ING., 3100 OSTERLOH, DE
分类号
E21B4/00;E21B4/02;E21B41/00;H02K7/18;(IPC1-7):H02K5/13;E21B4/04;F03B13/10
主分类号
E21B4/00
代理机构
代理人
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