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发明名称
DERRICK
摘要
申请公布号
SU1028832(A1)
申请公布日期
1983.07.15
申请号
SU19813363514
申请日期
1981.12.16
申请人
VOLGOGRADSKIJ ZAVOD BUROVOJ TEKHNIKI
发明人
KRISHCHENKO ANATOLIJ M,SU;SEMISOTNOV GENNADIJ F,SU
分类号
E21B15/00;(IPC1-7):E21B15/00
主分类号
E21B15/00
代理机构
代理人
主权项
地址
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