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发明名称
PRZYRZAD ILUSTRUJACY DIAGRAM VENNA
摘要
申请公布号
PL208019(A1)
申请公布日期
1979.08.27
申请号
PL19780208019
申请日期
1978.06.28
申请人
WYZSZA SZKOLA PEDAGOG
发明人
DYRSZLAG ZYGFRYD;MALCZAK MIECZYSLAW
分类号
G09B;(IPC1-7):G09B/
主分类号
G09B
代理机构
代理人
主权项
地址
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