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发明名称
STEUERVORRICHTUNG FUER DEN VOR- UND RUECKLAUF VON SELBSTGETRIEBENEN, PNEUMATISCHEN RAMMBOHR- GERAETEN
摘要
申请公布号
AT352053(B)
申请公布日期
1979.08.27
申请号
AT19770004748
申请日期
1977.07.04
申请人
SCHMIDT PAUL
发明人
分类号
E21B7/26;E02F5/18;E21B4/14;(IPC1-7):E21B1/00
主分类号
E21B7/26
代理机构
代理人
主权项
地址
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