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经营范围
发明名称
HYDROPERCUSSION DEVICE
摘要
申请公布号
SU1666687(A1)
申请公布日期
1991.07.30
申请号
SU19894673318
申请日期
1989.04.03
申请人
INST GORNOGO DELA IM.A.A.SKOCHINSKOGO
发明人
KOTOV VLADIMIR P,SU
分类号
E21C37/00;E21C27/28
主分类号
E21C37/00
代理机构
代理人
主权项
地址
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