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发明名称
KONTINUIERLICHE SPUELUNGSAUFBEREITUNG AN SPUELBOHRGERAETEN
摘要
申请公布号
DD288427(A5)
申请公布日期
1991.03.28
申请号
DD19890333498
申请日期
1989.10.11
申请人
VEB BRAUNKOHLENBOHRUNGEN UND SCHACHTBAU WELZOW,DE
发明人
KUPSCHICK,KARL-HEINZ,DE;SCHULZ,KLAUS,DE;LEIDEL,ERICH,DE
分类号
E21B21/00;(IPC1-7):E21B21/00
主分类号
E21B21/00
代理机构
代理人
主权项
地址
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