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发明名称
Способ вакуумирования бетона и образования в нем отверстий
摘要
申请公布号
SU74860(A1)
申请公布日期
1948.11.30
申请号
SU19470004049
申请日期
1947.09.13
申请人
GERSHBERG O.A.;RUMYANTSEV B.N.
发明人
GERSHBERG O.A.;RUMYANTSEV B.N.
分类号
E04G21/06
主分类号
E04G21/06
代理机构
代理人
主权项
地址
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