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发明名称
FORET A ETINCELLE A BASSE TENSION
摘要
申请公布号
BE784540(A1)
申请公布日期
1972.10.02
申请号
BE19720784540
申请日期
1972.06.07
申请人
TRW INC., ONE SPACE PARK, REDONDO BEACH, CALIFORNIE, (E.U.A.),
发明人
G.N. WOODRUFF
分类号
E21B7/15;(IPC1-7):E21B/
主分类号
E21B7/15
代理机构
代理人
主权项
地址
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