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发明名称
摘要
申请公布号
DE2025639(A1)
申请公布日期
1970.12.03
申请号
DE19702025639
申请日期
1970.05.26
申请人
发明人
分类号
B28D1/28;E21C25/02;(IPC1-7):E21C/
主分类号
B28D1/28
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