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发明名称
METHOD FOR WORKING INTERSTALL SUPPORT PILLARS
摘要
申请公布号
SU1689622(A1)
申请公布日期
1991.11.07
申请号
SU19894736433
申请日期
1989.09.13
申请人
DZHEZKAZGANSK NI PI TSVETNOJ
发明人
IMANGALIEV ASER,SU
分类号
E21C41/22
主分类号
E21C41/22
代理机构
代理人
主权项
地址
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