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发明名称
HYDRAULIC WELL REAMER
摘要
申请公布号
SU763570(A1)
申请公布日期
1980.09.15
申请号
SU19772553768
申请日期
1977.12.13
申请人
DAVIDYUK DMITRIJ M,SU;KUPCHENKO FEDOR A,SU
发明人
DAVIDYUK DMITRIJ M,SU;KUPCHENKO FEDOR A,SU
分类号
E21B7/28;E21B10/26;(IPC1-7):E21B9/26;E21C17/00
主分类号
E21B7/28
代理机构
代理人
主权项
地址
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