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发明名称
HYDRAULISCHE BOHRVORRICHTUNG FUER VORZUGSWEISE ERD- UND GESTEINSBOHREN
摘要
申请公布号
DD257466(A1)
申请公布日期
1988.06.15
申请号
DD19870299693
申请日期
1987.02.04
申请人
SDAG WISMUT,DD
发明人
HOFERICHTER,FRANK,DD;WALTHER,MANFRED,DD
分类号
E21B6/00;(IPC1-7):E21B6/00
主分类号
E21B6/00
代理机构
代理人
主权项
地址
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