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发明名称
BIT FOR BORES ROTARY DRILLING
摘要
申请公布号
CS259031(B1)
申请公布日期
1988.09.16
申请号
CS19840006743
申请日期
1984.09.07
申请人
BAJCEV,EMIL I.,BG;TODOROV,EMIL G.,BG;BABERKOV,IVAN P.,BG;MLADENOV,PANDO I.,BG;CUGULAJ,DIMITR K.,BG
发明人
BAJCEV,EMIL I.,BG;TODOROV,EMIL G.,BG;BABERKOV,IVAN P.,BG;MLADENOV,PANDO I.,BG;CUGULAJ,DIMITR K.,BG
分类号
E21B10/44;(IPC1-7):E21B10/44
主分类号
E21B10/44
代理机构
代理人
主权项
地址
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