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发明名称
Clef à écrous pour installations de voies ferrées comportant un dispositif pour le dégagement des éclisses
摘要
申请公布号
FR1145189(A)
申请公布日期
1957.10.23
申请号
FRD1145189
申请日期
1955.11.15
申请人
发明人
LEHNARD HANS
分类号
E01B29/28
主分类号
E01B29/28
代理机构
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