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发明名称
Устройство для центрирования труб при сварке
摘要
申请公布号
SU87144(A1)
申请公布日期
1949.11.30
申请号
SU19490397833
申请日期
1949.05.23
申请人
BESKOROVAJNYJ V.M.
发明人
BESKOROVAJNYJ V.M.
分类号
B23K37/04;B21D39/04
主分类号
B23K37/04
代理机构
代理人
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