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发明名称
Способ изготовления углей для электрической дуги
摘要
申请公布号
SU71228(A1)
申请公布日期
1947.11.30
申请号
SU19470355265
申请日期
1947.04.30
申请人
PETROVSKIJ B.N.
发明人
PETROVSKIJ B.N.
分类号
H05B31/16
主分类号
H05B31/16
代理机构
代理人
主权项
地址
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