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发明名称
MANHOLE COVER
摘要
申请公布号
SU901147(A1)
申请公布日期
1982.01.30
申请号
SU19802889473
申请日期
1980.03.03
申请人
ZOTOVKA NIKOLAJ,SU
发明人
ZOTOVKA NIKOLAJ I,SU
分类号
B63B19/24;(IPC1-7):B63B19/24
主分类号
B63B19/24
代理机构
代理人
主权项
地址
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