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发明名称
PROCESSO PARA A PRODUCAO DE TRAVESSAS PARA MUDANCA DE VIA FEITAS EM BETAO
摘要
申请公布号
PT91143(A)
申请公布日期
1990.02.08
申请号
PT19890091143
申请日期
1989.07.12
申请人
WAYSS AND FREYTAG AG
发明人
FRITHJOF SCHIMPFF
分类号
B28B7/30;B28B23/00;E01B7/22;(IPC1-7):E01B3/00
主分类号
B28B7/30
代理机构
代理人
主权项
地址
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