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发明名称
Приспособление, предохраняющее стрелки от засорения
摘要
申请公布号
SU20690(A1)
申请公布日期
1931.05.31
申请号
SU19300069351
申请日期
1930.05.03
申请人
PSHINKA I.F.
发明人
PSHINKA I.F.
分类号
B61L5/00
主分类号
B61L5/00
代理机构
代理人
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地址
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