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发明名称
DISPOSITIVO ELASTICO PARA LA CONSTRUCCION DE CONDUCTOS TU- BULARES DE HORMIGON.
摘要
申请公布号
ES173171(Y)
申请公布日期
1972.10.16
申请号
ES19710173171U
申请日期
1971.10.09
申请人
ALCALDE PECERO
发明人
分类号
E04G
主分类号
E04G
代理机构
代理人
主权项
地址
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