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发明名称
Niveau perfectionné
摘要
申请公布号
FR969880(A)
申请公布日期
1950.12.27
申请号
FRD969880
申请日期
1948.07.23
申请人
发明人
GINTZ MAURICE-ROBERT-JACQU
分类号
G01C9/24;G01C9/26
主分类号
G01C9/24
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