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发明名称
Dispositif pour soulever un anneau de puits fixe dans un regard d'égout
摘要
申请公布号
FR1511830(A)
申请公布日期
1968.02.02
申请号
FR19670095255
申请日期
1967.02.16
申请人
W. DIRINGER OHG
发明人
分类号
B66F19/00;E02D29/14;E03F5/02
主分类号
B66F19/00
代理机构
代理人
主权项
地址
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