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发明名称
Kernschalung zum Herstellen von Betonroehren grosser Laenge, bestehend aus durch ein in ihrem Inneren konzentrisch angeordnetes Gestaenge spreizbaren Schalsegmenten
摘要
申请公布号
DE1056522(B)
申请公布日期
1959.04.30
申请号
DE1954B032296
申请日期
1954.08.19
申请人
JOSEF BOESSNER
发明人
BOESSNER JOSEF
分类号
B28B21/88
主分类号
B28B21/88
代理机构
代理人
主权项
地址
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