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发明名称
Verfahren zur Ent- und Bewässerung größerer Geländeflächen
摘要
申请公布号
AT163721(B)
申请公布日期
1949.08.10
申请号
ATD163721
申请日期
1947.03.07
申请人
FRANZ STEIGEL
发明人
FRANZ STEIGEL
分类号
主分类号
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