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发明名称
BIT-SECURING DEVICE
摘要
申请公布号
SU727846(A2)
申请公布日期
1980.04.15
申请号
SU19772535426
申请日期
1977.10.21
申请人
MARIJSKIJ POLT I IM.M.GORKOGO
发明人
YUDIN VALERIJ G,SU
分类号
E21C35/19;(IPC1-7):E21C25/46
主分类号
E21C35/19
代理机构
代理人
主权项
地址
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