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申请公布号
SU18923(A1)
申请公布日期
1931.01.31
申请号
SU19290060739
申请日期
1929.12.26
申请人
TRAVIN N.P.
发明人
TRAVIN N.P.
分类号
E04B1/00
主分类号
E04B1/00
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