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发明名称
BIT HOLDER
摘要
申请公布号
SU588367(A1)
申请公布日期
1978.01.15
申请号
SU19711648270
申请日期
1971.04.21
申请人
SHAKHTINSKIJ NI PK UGOLNYJ I IM. A.M.TERPIGOREVA SHAKHTNIUI
发明人
FREJMAN ZARA A,SU;LIVSHITS ILYA YA,SU
分类号
E21C35/19;E21C27/32;(IPC1-7):E21C25/38
主分类号
E21C35/19
代理机构
代理人
主权项
地址
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