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发明名称
摘要
申请公布号
DE2756255(C2)
申请公布日期
1987.06.19
申请号
DE19772756255
申请日期
1977.12.16
申请人
ENTERPRISES DE TRAVAUX PUBLICS ET PRIVES J.RICHARD S.A., LONCIN-LIEGE, BE
发明人
RICHARD, ANDRE JOSEPH, LUETTICH/LIEGE, BE;DELMOTTE, PHILIPPE MARIE, RAMILLIES-OFFUS, BE;PARTHOENS, PIERRE ARNOLD, BASSENGE, BE
分类号
E01D2/04;E01D4/00;E01D21/00;(IPC1-7):E01D21/04;E01D7/00
主分类号
E01D2/04
代理机构
代理人
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