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发明名称
Niveau à voyant éclairé
摘要
申请公布号
FR1131899(A)
申请公布日期
1957.02.28
申请号
FRD1131899
申请日期
1955.03.28
申请人
发明人
HUGON CHARLES-JOSEPH
分类号
G01C9/32
主分类号
G01C9/32
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代理人
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