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发明名称
DEMOUNTABLE DRILLING BIT
摘要
申请公布号
SU1606676(A1)
申请公布日期
1990.11.15
申请号
SU19874323344
申请日期
1987.10.30
申请人
INST PROBLEM MATERIALOVEDENIA
发明人
VORONIN GEORGIJ A,SU;RABINOVICH SEMEN V,SU;ANDRUSHCHAK OLEG A,SU;VOLKOGON VLADIMIR M,SU;KARYUK GENNADIJ G,SU;ZAMETAJLO VLADIMIR V,SU
分类号
E21B10/20;(IPC1-7):E21B10/20
主分类号
E21B10/20
代理机构
代理人
主权项
地址
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