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发明名称
Устройство для герметического закрывания дейдвудной трубы
摘要
申请公布号
SU91222(A1)
申请公布日期
1950.11.30
申请号
SU19500436118
申请日期
1950.10.04
申请人
SEMENOV N.F.
发明人
SEMENOV N.F.
分类号
B63H23/36
主分类号
B63H23/36
代理机构
代理人
主权项
地址
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