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发明名称
METHOD OF WORKING MEDIUM-THICK AND THICK COAL BEDS
摘要
申请公布号
SU994734(A1)
申请公布日期
1983.02.07
申请号
SU19802892716
申请日期
1980.03.07
申请人
KUZBASSKIJ POLT INSTITUT
发明人
RYZHKOV YURIJ A,SU;TIKHONOV GENNADIJ S,SU;ORLOV VLADIMIR N,SU
分类号
(IPC1-7):E21C41/04
主分类号
(IPC1-7):E21C41/04
代理机构
代理人
主权项
地址
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