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发明名称
METHOD OF WELDING ANNULAR JOINTS OF PIPELINES
摘要
申请公布号
SU657940(A1)
申请公布日期
1979.04.25
申请号
SU19772449073
申请日期
1977.01.28
申请人
KALASHNIKOV BORIS F,SU
发明人
KALASHNIKOV BORIS F,SU
分类号
(IPC1-7):B23K31/06
主分类号
(IPC1-7):B23K31/06
代理机构
代理人
主权项
地址
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