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发明名称
AGENCEMENT POUR ELARGIR ET FORMER DES PUITS OU CHEMINEES DE PETITES DIMENSIONS VERTICAUX OU FORTEMENT INCLINES
摘要
申请公布号
FR2341033(A1)
申请公布日期
1977.09.09
申请号
FR19770003955
申请日期
1977.02.11
申请人
LINDEN ALIMAK AB
发明人
分类号
E21B7/02;E21D1/03;E21D5/12
主分类号
E21B7/02
代理机构
代理人
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