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发明名称
APPARATUS FOR CLOSING PIPELINE
摘要
申请公布号
SU815417(A1)
申请公布日期
1981.03.23
申请号
SU19772458480
申请日期
1977.03.01
申请人
GROMOV ALEKSANDR G,SU
发明人
GROMOV ALEKSANDR G,SU
分类号
F16L55/12;(IPC1-7):F16L55/12
主分类号
F16L55/12
代理机构
代理人
主权项
地址
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