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发明名称
BORING COLUMN RETAINING AND CENTERING DEVICE
摘要
申请公布号
SU1765384(A1)
申请公布日期
1992.09.30
申请号
SU19904805486
申请日期
1990.03.23
申请人
DO GPKEXI KOMPLEX MEKH SHAKHT
发明人
RADZIVILOVICH LEONID L,SU;BARANOVSKIJ MIKHAIL S,SU;SYTNIK ANATOLIJ V,SU
分类号
E21B19/24
主分类号
E21B19/24
代理机构
代理人
主权项
地址
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